diff --git a/anvil-loader/build.gradle b/anvil-loader/build.gradle
new file mode 100644
index 0000000..2328060
--- /dev/null
+++ b/anvil-loader/build.gradle
@@ -0,0 +1,9 @@
+group 'mc'
+version '1.0-SNAPSHOT'
+
+dependencies {
+    /* Core */
+    compile_excludeCopy project(':core')
+
+    compile (group: 'net.sf.trove4j', name: 'trove4j', version: '3.0.3')
+}
\ No newline at end of file
diff --git a/anvil-loader/src/main/java/com/flowpowered/nbt/LongArrayTag.java b/anvil-loader/src/main/java/com/flowpowered/nbt/LongArrayTag.java
new file mode 100644
index 0000000..47b09ee
--- /dev/null
+++ b/anvil-loader/src/main/java/com/flowpowered/nbt/LongArrayTag.java
@@ -0,0 +1,73 @@
+package com.flowpowered.nbt;
+
+import java.util.Arrays;
+
+public class LongArrayTag extends Tag<long[]> {
+    /**
+     * The value.
+     */
+    private final long[] value;
+
+    /**
+     * Creates the tag.
+     *
+     * @param name The name.
+     * @param value The value.
+     */
+    public LongArrayTag(String name, long[] value) {
+        super(TagType.TAG_LONG_ARRAY, name);
+        this.value = value;
+    }
+
+    @Override
+    public long[] getValue() {
+        return value;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder hex = new StringBuilder();
+        for (long s : value) {
+            String hexDigits = Long.toHexString(s).toUpperCase();
+            if (hexDigits.length() == 1) {
+                hex.append("0");
+            }
+            hex.append(hexDigits).append(" ");
+        }
+
+        String name = getName();
+        String append = "";
+        if (name != null && !name.equals("")) {
+            append = "(\"" + this.getName() + "\")";
+        }
+        return "TAG_Long_Array" + append + ": " + hex.toString();
+    }
+
+    @Override
+    public LongArrayTag clone() {
+        long[] clonedArray = cloneArray(value);
+
+        return new LongArrayTag(getName(), clonedArray);
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (!(other instanceof IntArrayTag)) {
+            return false;
+        }
+
+        LongArrayTag tag = (LongArrayTag) other;
+        return Arrays.equals(value, tag.value) && getName().equals(tag.getName());
+    }
+
+    private long[] cloneArray(long[] longArray) {
+        if (longArray == null) {
+            return null;
+        } else {
+            int length = longArray.length;
+            byte[] newArray = new byte[length];
+            System.arraycopy(longArray, 0, newArray, 0, length);
+            return longArray;
+        }
+    }
+}
diff --git a/anvil-loader/src/main/java/com/flowpowered/nbt/NBTConstants.java b/anvil-loader/src/main/java/com/flowpowered/nbt/NBTConstants.java
new file mode 100644
index 0000000..f6dd1b4
--- /dev/null
+++ b/anvil-loader/src/main/java/com/flowpowered/nbt/NBTConstants.java
@@ -0,0 +1,38 @@
+package com.flowpowered.nbt;
+
+import java.nio.charset.Charset;
+
+/**
+ * A class which holds constant values.
+ */
+public final class NBTConstants {
+    /**
+     * The character set used by NBT (UTF-8).
+     */
+    public static final Charset CHARSET = Charset.forName("UTF-8");
+    /**
+     * Tag type constants.
+     */
+    @Deprecated
+    public static final int TYPE_END = TagType.TAG_END.getId(),
+            TYPE_BYTE = TagType.TAG_BYTE.getId(),
+            TYPE_SHORT = TagType.TAG_SHORT.getId(),
+            TYPE_INT = TagType.TAG_INT.getId(),
+            TYPE_LONG = TagType.TAG_LONG.getId(),
+            TYPE_FLOAT = TagType.TAG_FLOAT.getId(),
+            TYPE_DOUBLE = TagType.TAG_DOUBLE.getId(),
+            TYPE_BYTE_ARRAY = TagType.TAG_BYTE_ARRAY.getId(),
+            TYPE_STRING = TagType.TAG_STRING.getId(),
+            TYPE_LIST = TagType.TAG_LIST.getId(),
+            TYPE_COMPOUND = TagType.TAG_COMPOUND.getId(),
+            TYPE_INT_ARRAY = TagType.TAG_INT_ARRAY.getId(),
+            TYPE_SHORT_ARRAY = TagType.TAG_SHORT_ARRAY.getId(),
+            TYPE_LONG_ARRAY = TagType.TAG_LONG_ARRAY.getId();
+
+    /**
+     * Default private constructor.
+     */
+    private NBTConstants() {
+    }
+}
+
diff --git a/anvil-loader/src/main/java/com/flowpowered/nbt/TagType.java b/anvil-loader/src/main/java/com/flowpowered/nbt/TagType.java
new file mode 100644
index 0000000..444e3e2
--- /dev/null
+++ b/anvil-loader/src/main/java/com/flowpowered/nbt/TagType.java
@@ -0,0 +1,94 @@
+package com.flowpowered.nbt;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public enum TagType {
+    TAG_END(EndTag.class, "TAG_End", 0),
+    TAG_BYTE(ByteTag.class, "TAG_Byte", 1),
+    TAG_SHORT(ShortTag.class, "TAG_Short", 2),
+    TAG_INT(IntTag.class, "TAG_Int", 3),
+    TAG_LONG(LongTag.class, "TAG_Long", 4),
+    TAG_FLOAT(FloatTag.class, "TAG_Float", 5),
+    TAG_DOUBLE(DoubleTag.class, "TAG_Double", 6),
+    TAG_BYTE_ARRAY(ByteArrayTag.class, "TAG_Byte_Array", 7),
+    TAG_STRING(StringTag.class, "TAG_String", 8),
+    @SuppressWarnings("unchecked")
+    TAG_LIST((Class) ListTag.class, "TAG_List", 9),
+    // Java generics, y u so suck
+    TAG_COMPOUND(CompoundTag.class, "TAG_Compound", 10),
+    TAG_INT_ARRAY(IntArrayTag.class, "TAG_Int_Array", 11),
+    TAG_LONG_ARRAY(LongArrayTag.class, "TAG_Long_Array", 12),
+    TAG_SHORT_ARRAY(ShortArrayTag.class, "TAG_Short_Array", 100),;
+    private static final Map<Class<? extends Tag<?>>, TagType> BY_CLASS = new HashMap<Class<? extends Tag<?>>, TagType>();
+    private static final Map<String, TagType> BY_NAME = new HashMap<String, TagType>();
+    private static final TagType[] BY_ID;
+
+    static {
+        BY_ID = new TagType[BaseData.maxId + 1];
+        for (TagType type : TagType.values()) {
+            BY_CLASS.put(type.getTagClass(), type);
+            BY_NAME.put(type.getTypeName(), type);
+            BY_ID[type.getId()] = type;
+        }
+    }
+
+    private final Class<? extends Tag<?>> tagClass;
+    private final String typeName;
+    private final int id;
+
+    private TagType(Class<? extends Tag<?>> tagClass, String typeName, int id) {
+        this.tagClass = tagClass;
+        this.typeName = typeName;
+        this.id = id;
+        // Such a hack, shame that Java makes this such a pain
+        if (this.id > BaseData.maxId) {
+            BaseData.maxId = this.id;
+        }
+    }
+
+    public Class<? extends Tag<?>> getTagClass() {
+        return tagClass;
+    }
+
+    public String getTypeName() {
+        return typeName;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public static TagType getByTagClass(Class<? extends Tag<?>> clazz) {
+        TagType ret = BY_CLASS.get(clazz);
+        if (ret == null) {
+            throw new IllegalArgumentException("Tag type " + clazz + " is unknown!");
+        }
+        return ret;
+    }
+
+    public static TagType getByTypeName(String typeName) {
+        TagType ret = BY_NAME.get(typeName);
+        if (ret == null) {
+            throw new IllegalArgumentException("Tag type " + typeName + " is unknown!");
+        }
+        return ret;
+    }
+
+    public static TagType getById(int id) {
+        if (id >= 0 && id < BY_ID.length) {
+            TagType ret = BY_ID[id];
+            if (ret == null) {
+                throw new IllegalArgumentException("Tag type id " + id + " is unknown!");
+            }
+            return ret;
+        } else {
+            throw new IndexOutOfBoundsException("Tag type id " + id + " is out of bounds!");
+        }
+    }
+
+    private static class BaseData {
+        private static int maxId = 0;
+    }
+}
diff --git a/anvil-loader/src/main/java/com/flowpowered/nbt/stream/NBTInputStream.java b/anvil-loader/src/main/java/com/flowpowered/nbt/stream/NBTInputStream.java
new file mode 100644
index 0000000..8298779
--- /dev/null
+++ b/anvil-loader/src/main/java/com/flowpowered/nbt/stream/NBTInputStream.java
@@ -0,0 +1,210 @@
+package com.flowpowered.nbt.stream;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.ByteOrder;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.zip.GZIPInputStream;
+
+import com.flowpowered.nbt.*;
+
+/**
+ * This class reads NBT, or Named Binary Tag streams, and produces an object graph of subclasses of the {@link Tag} object. <p /> The NBT format was created by Markus Persson, and the specification
+ * may be found at <a href="https://flowpowered.com/nbt/spec.txt"> https://flowpowered.com/nbt/spec.txt</a>.
+ */
+public final class NBTInputStream implements Closeable {
+    /**
+     * The data input stream.
+     */
+    private final EndianSwitchableInputStream is;
+
+    /**
+     * Creates a new {@link NBTInputStream}, which will source its data from the specified input stream. This assumes the stream is compressed.
+     *
+     * @param is The input stream.
+     * @throws java.io.IOException if an I/O error occurs.
+     */
+    public NBTInputStream(InputStream is) throws IOException {
+        this(is, true, ByteOrder.BIG_ENDIAN);
+    }
+
+    /**
+     * Creates a new {@link NBTInputStream}, which sources its data from the specified input stream. A flag must be passed which indicates if the stream is compressed with GZIP or not. This assumes the
+     * stream uses big endian encoding.
+     *
+     * @param is The input stream.
+     * @param compressed A flag indicating if the stream is compressed.
+     * @throws java.io.IOException if an I/O error occurs.
+     */
+    public NBTInputStream(InputStream is, boolean compressed) throws IOException {
+        this(is, compressed, ByteOrder.BIG_ENDIAN);
+    }
+
+    /**
+     * Creates a new {@link NBTInputStream}, which sources its data from the specified input stream. A flag must be passed which indicates if the stream is compressed with GZIP or not.
+     *
+     * @param is The input stream.
+     * @param compressed A flag indicating if the stream is compressed.
+     * @param endianness Whether to read numbers from the InputStream with little endian encoding.
+     * @throws java.io.IOException if an I/O error occurs.
+     */
+    public NBTInputStream(InputStream is, boolean compressed, ByteOrder endianness) throws IOException {
+        this.is = new EndianSwitchableInputStream(compressed ? new GZIPInputStream(is) : is, endianness);
+    }
+
+    /**
+     * Reads an NBT {@link Tag} from the stream.
+     *
+     * @return The tag that was read.
+     * @throws java.io.IOException if an I/O error occurs.
+     */
+    public Tag readTag() throws IOException {
+        return readTag(0);
+    }
+
+    /**
+     * Reads an NBT {@link Tag} from the stream.
+     *
+     * @param depth The depth of this tag.
+     * @return The tag that was read.
+     * @throws java.io.IOException if an I/O error occurs.
+     */
+    private Tag readTag(int depth) throws IOException {
+        int typeId = is.readByte() & 0xFF;
+        TagType type = TagType.getById(typeId);
+
+        String name;
+        if (type != TagType.TAG_END) {
+            int nameLength = is.readShort() & 0xFFFF;
+            byte[] nameBytes = new byte[nameLength];
+            is.readFully(nameBytes);
+            name = new String(nameBytes, NBTConstants.CHARSET.name());
+        } else {
+            name = "";
+        }
+
+        return readTagPayload(type, name, depth);
+    }
+
+    /**
+     * Reads the payload of a {@link Tag}, given the name and type.
+     *
+     * @param type The type.
+     * @param name The name.
+     * @param depth The depth.
+     * @return The tag.
+     * @throws java.io.IOException if an I/O error occurs.
+     */
+    @SuppressWarnings ({"unchecked", "rawtypes"})
+    private Tag readTagPayload(TagType type, String name, int depth) throws IOException {
+        switch (type) {
+            case TAG_END:
+                if (depth == 0) {
+                    throw new IOException("TAG_End found without a TAG_Compound/TAG_List tag preceding it.");
+                } else {
+                    return new EndTag();
+                }
+
+            case TAG_BYTE:
+                return new ByteTag(name, is.readByte());
+
+            case TAG_SHORT:
+                return new ShortTag(name, is.readShort());
+
+            case TAG_INT:
+                return new IntTag(name, is.readInt());
+
+            case TAG_LONG:
+                return new LongTag(name, is.readLong());
+
+            case TAG_FLOAT:
+                return new FloatTag(name, is.readFloat());
+
+            case TAG_DOUBLE:
+                return new DoubleTag(name, is.readDouble());
+
+            case TAG_BYTE_ARRAY:
+                int length = is.readInt();
+                byte[] bytes = new byte[length];
+                is.readFully(bytes);
+                return new ByteArrayTag(name, bytes);
+
+            case TAG_STRING:
+                length = is.readShort();
+                bytes = new byte[length];
+                is.readFully(bytes);
+                return new StringTag(name, new String(bytes, NBTConstants.CHARSET.name()));
+
+            case TAG_LIST:
+                TagType childType = TagType.getById(is.readByte());
+                length = is.readInt();
+
+                Class<? extends Tag> clazz = childType.getTagClass();
+                List<Tag> tagList = new ArrayList<Tag>(length);
+                for (int i = 0; i < length; i++) {
+                    Tag tag = readTagPayload(childType, "", depth + 1);
+                    if (tag instanceof EndTag) {
+                        throw new IOException("TAG_End not permitted in a list.");
+                    } else if (!clazz.isInstance(tag)) {
+                        throw new IOException("Mixed tag types within a list.");
+                    }
+                    tagList.add(tag);
+                }
+
+                return new ListTag(name, clazz, tagList);
+
+            case TAG_COMPOUND:
+                CompoundMap compoundTagList = new CompoundMap();
+                while (true) {
+                    Tag tag = readTag(depth + 1);
+                    if (tag instanceof EndTag) {
+                        break;
+                    } else {
+                        compoundTagList.put(tag);
+                    }
+                }
+
+                return new CompoundTag(name, compoundTagList);
+
+            case TAG_INT_ARRAY:
+                length = is.readInt();
+                int[] ints = new int[length];
+                for (int i = 0; i < length; i++) {
+                    ints[i] = is.readInt();
+                }
+                return new IntArrayTag(name, ints);
+
+            case TAG_SHORT_ARRAY:
+                length = is.readInt();
+                short[] shorts = new short[length];
+                for (int i = 0; i < length; i++) {
+                    shorts[i] = is.readShort();
+                }
+                return new ShortArrayTag(name, shorts);
+
+            case TAG_LONG_ARRAY:
+                length = is.readInt();
+                long[] longs = new long[length];
+                for (int i = 0; i < length; i++) {
+                    longs[i] = is.readLong();
+                }
+                return new LongArrayTag(name, longs);
+
+            default:
+                throw new IOException("Invalid tag type: " + type + ".");
+        }
+    }
+
+    public void close() throws IOException {
+        is.close();
+    }
+
+    /**
+     * @return whether this NBTInputStream reads numbers in little-endian format.
+     */
+    public ByteOrder getByteOrder() {
+        return is.getEndianness();
+    }
+}
diff --git a/anvil-loader/src/main/java/mc/world/anvil/AnvilBlock.java b/anvil-loader/src/main/java/mc/world/anvil/AnvilBlock.java
new file mode 100644
index 0000000..990e6e9
--- /dev/null
+++ b/anvil-loader/src/main/java/mc/world/anvil/AnvilBlock.java
@@ -0,0 +1,80 @@
+package mc.world.anvil;
+
+import com.flowpowered.nbt.CompoundTag;
+import lombok.extern.slf4j.Slf4j;
+import mc.core.world.block.Block;
+import mc.core.world.block.BlockLocation;
+import mc.core.world.block.BlockType;
+
+@Slf4j
+public class AnvilBlock implements Block {
+    private final AnvilChunkSection chunkSection;
+    private final BlockLocation location;
+    private BlockLocation globalLocation;
+
+    public AnvilBlock(AnvilChunkSection chunkSection, int x, int y, int z) {
+        this.chunkSection = chunkSection;
+        this.location = new BlockLocation(x, y, z);
+    }
+
+    @Override
+    public int getLight() {
+        return chunkSection.getBlockLight().get(location);
+    }
+
+    @Override
+    public void setLight(int light) {
+        // nope...
+    }
+
+    @Override
+    public BlockType getType() {
+        final byte id = chunkSection.getBlocks().get((location.getY() << 8) + (location.getZ() << 4) + location.getX());
+        final int meta = chunkSection.getBlocksMeta().get(location);
+        BlockType type = BlockType.getByIdMeta(id & 0xFF, meta);
+        if (type.equals(BlockType.BEDROCK) && id != 7) {
+            log.warn("ChunkSection: {},{},{} | Block: {}",
+                     chunkSection.getParent().getX(),
+                     chunkSection.getY(),
+                     chunkSection.getParent().getZ(),
+                     location.toString());
+        }
+        return type;
+    }
+
+    @Override
+    public BlockLocation getLocation() {
+        if (globalLocation == null) {
+            globalLocation = new BlockLocation(
+                    (chunkSection.getParent().getX() << 4) + location.getX(),
+                    (chunkSection.getY() << 4) + location.getY(),
+                    (chunkSection.getParent().getZ() << 4) + location.getZ()
+            );
+        }
+        return globalLocation;
+    }
+
+    @Override
+    public CompoundTag getNBTData() {
+        CompoundTag compoundTag = ((AnvilChunk)chunkSection.getParent()).getNbtByGlobalXYZ(
+                (chunkSection.getParent().getX() << 4) + location.getX(),
+                (chunkSection.getY() << 4) + location.getY(),
+                (chunkSection.getParent().getZ() << 4) + location.getZ()
+        );
+
+        if (compoundTag != null) {
+            compoundTag.getValue().remove("Items");
+            compoundTag.getValue().remove("Lock");
+        }
+
+        return compoundTag;
+    }
+
+    @Override
+    public String toString() {
+        return "AnvilBlock{" +
+                "location=" + getLocation() +
+                ", type=" + getType() +
+                '}';
+    }
+}
diff --git a/anvil-loader/src/main/java/mc/world/anvil/AnvilChunk.java b/anvil-loader/src/main/java/mc/world/anvil/AnvilChunk.java
new file mode 100644
index 0000000..a0a985d
--- /dev/null
+++ b/anvil-loader/src/main/java/mc/world/anvil/AnvilChunk.java
@@ -0,0 +1,137 @@
+package mc.world.anvil;
+
+import com.flowpowered.nbt.ByteArrayTag;
+import com.flowpowered.nbt.ByteTag;
+import com.flowpowered.nbt.CompoundMap;
+import com.flowpowered.nbt.CompoundTag;
+import com.flowpowered.nbt.IntTag;
+import com.flowpowered.nbt.ListTag;
+import gnu.trove.list.TByteList;
+import gnu.trove.list.array.TByteArrayList;
+import lombok.Getter;
+import lombok.extern.slf4j.Slf4j;
+import mc.core.utils.NibbleArray;
+import mc.core.world.Biome;
+import mc.core.world.block.Block;
+import mc.core.world.chunk.Chunk;
+import mc.core.world.chunk.ChunkSection;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Slf4j
+@Getter
+public class AnvilChunk implements Chunk {
+    private int x;
+    private int z;
+    private TByteList biomes = new TByteArrayList(256);
+    private List<ChunkSection> sections;
+    private ListTag<CompoundTag> tileEntities;
+
+    @SuppressWarnings("unchecked")
+    AnvilChunk(CompoundTag chunkTag) {
+        CompoundMap levelTagMap = ((CompoundTag) chunkTag.getValue().get("Level")).getValue();
+
+        this.x = ((IntTag) levelTagMap.get("xPos")).getValue();
+        this.z = ((IntTag) levelTagMap.get("zPos")).getValue();
+
+        biomes.add(((ByteArrayTag) levelTagMap.get("Biomes")).getValue());
+        tileEntities = (ListTag<CompoundTag>) levelTagMap.get("TileEntities");
+
+        List<CompoundTag> sections = ((ListTag<CompoundTag>) levelTagMap.get("Sections")).getValue();
+        this.sections = new ArrayList<>(sections.size());
+
+        for (CompoundTag sectionTag : sections) {
+            CompoundMap sectionTagValue = sectionTag.getValue();
+
+            AnvilChunkSection chunkSection = new AnvilChunkSection();
+            chunkSection.setParent(this);
+            chunkSection.setY(((ByteTag) sectionTagValue.get("Y")).getValue());
+
+            chunkSection.setBlockLight(new NibbleArray(((ByteArrayTag) sectionTagValue.get("BlockLight")).getValue()));
+            chunkSection.setSkyLight(new NibbleArray(((ByteArrayTag) sectionTagValue.get("SkyLight")).getValue()));
+            chunkSection.getBlocks().add(((ByteArrayTag) sectionTagValue.get("Blocks")).getValue());
+            chunkSection.setBlocksMeta(new NibbleArray(((ByteArrayTag) sectionTagValue.get("Data")).getValue()));
+
+            this.sections.add(chunkSection);
+        }
+    }
+
+    CompoundTag getNbtByGlobalXYZ(int x, int y, int z) {
+        for (CompoundTag compoundTag : tileEntities.getValue()) {
+            CompoundMap compoundMap = compoundTag.getValue();
+            if (((IntTag)compoundMap.get("x")).getValue() == x
+                    && ((IntTag)compoundMap.get("y")).getValue() == y
+                    && ((IntTag)compoundMap.get("z")).getValue() == z) {
+                return compoundTag;
+            }
+        }
+        return null;
+    }
+
+    @Override
+    public ChunkSection getChunkSection(int height) {
+        if (height > sections.size()-1) return null;
+        return sections.get(height);
+    }
+
+    @Override
+    public void setChunkSection(int height, ChunkSection chunkSection) {
+        // nope...
+    }
+
+    @Override
+    public Block getBlock(int x, int y, int z) {
+        final int height = y >> 4;
+        return sections.get(height).getBlock(
+                x - getX() << 4,
+                y - height << 4,
+                z - getZ() << 4
+        );
+    }
+
+    @Override
+    public void setBlock(Block block) {
+        // nope...
+    }
+
+    @Override
+    public int getSkyLight(int x, int y, int z) {
+        final int height = y >> 4;
+        return sections.get(height).getSkyLight(
+                x - getX() << 4,
+                y - height << 4,
+                z - getZ() << 4
+        );
+    }
+
+    @Override
+    public void setSkyLight(int x, int y, int z, int lightLevel) {
+        // nope...
+    }
+
+    @Override
+    public int getAddition(int x, int y, int z) {
+        final int height = y >> 4;
+        return sections.get(height).getAddition(
+                x - getX() << 4,
+                y - height << 4,
+                z - getZ() << 4
+        );
+    }
+
+    @Override
+    public void setAddition(int x, int y, int z, int value) {
+        // nope...
+    }
+
+    @Override
+    public Biome getBiome(int x, int z) {
+        return Biome.getById(biomes.get((z >> 4) << 4 | (x >> 4)) & 255);
+    }
+
+    @Override
+    public void setBiome(int x, int z, Biome biome) {
+        // nope...
+    }
+}
diff --git a/anvil-loader/src/main/java/mc/world/anvil/AnvilChunkProvider.java b/anvil-loader/src/main/java/mc/world/anvil/AnvilChunkProvider.java
new file mode 100644
index 0000000..d3fafc3
--- /dev/null
+++ b/anvil-loader/src/main/java/mc/world/anvil/AnvilChunkProvider.java
@@ -0,0 +1,50 @@
+package mc.world.anvil;
+
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.extern.slf4j.Slf4j;
+import mc.core.world.chunk.Chunk;
+import mc.core.world.chunk.ChunkProvider;
+import org.springframework.stereotype.Component;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+@Slf4j
+@Component
+@NoArgsConstructor
+@Setter
+public class AnvilChunkProvider implements ChunkProvider {
+    private RegionManager regionManager;
+
+    public AnvilChunkProvider(String mapPath) {
+        Path pathMap = Paths.get(mapPath);
+        if (Files.exists(pathMap)) {
+            log.info("Use Anvil map from \"{}\"", pathMap);
+            this.setRegionManager(new RegionManager(pathMap.resolve("region")));
+        } else {
+            log.error("Anvil map: path \"{}\" not found!!!", pathMap);
+        }
+    }
+
+    @Override
+    public Chunk getChunk(int x, int z) {
+        Region region = regionManager.getRegion(x >> 5, z >> 5);
+        if (region == null) {
+            return new EmptyChunk(x, z);
+        } else {
+            return region.getChunk(x, z);
+        }
+    }
+
+    @Override
+    public void saveChunk(Chunk chunk) {
+        // nope
+    }
+
+    @Override
+    public void saveChunk(Chunk... chunks) {
+        // nope
+    }
+}
diff --git a/anvil-loader/src/main/java/mc/world/anvil/AnvilChunkSection.java b/anvil-loader/src/main/java/mc/world/anvil/AnvilChunkSection.java
new file mode 100644
index 0000000..1892e57
--- /dev/null
+++ b/anvil-loader/src/main/java/mc/world/anvil/AnvilChunkSection.java
@@ -0,0 +1,57 @@
+package mc.world.anvil;
+
+import gnu.trove.list.TByteList;
+import gnu.trove.list.linked.TByteLinkedList;
+import lombok.Getter;
+import lombok.Setter;
+import mc.core.utils.NibbleArray;
+import mc.core.world.block.Block;
+import mc.core.world.chunk.Chunk;
+import mc.core.world.chunk.ChunkSection;
+
+@Getter
+public class AnvilChunkSection implements ChunkSection {
+    @Setter
+    private Chunk parent;
+
+    @Setter
+    private int y;
+
+    private TByteList blocks = new TByteLinkedList();
+    @Setter
+    private NibbleArray blocksMeta;
+    @Setter
+    private NibbleArray blockLight;
+    @Setter
+    private NibbleArray skyLight;
+
+    @Override
+    public Block getBlock(int x, int y, int z) {
+        return new AnvilBlock(this, x, y, z);
+    }
+
+    @Override
+    public void setBlock(Block block) {
+        // nope...
+    }
+
+    @Override
+    public int getSkyLight(int x, int y, int z) {
+        return skyLight.get(x, y, z);
+    }
+
+    @Override
+    public void setSkyLight(int x, int y, int z, int lightLevel) {
+        // nope...
+    }
+
+    @Override
+    public int getAddition(int x, int y, int z) {
+        return 0;
+    }
+
+    @Override
+    public void setAddition(int x, int y, int z, int value) {
+        // nope...
+    }
+}
diff --git a/anvil-loader/src/main/java/mc/world/anvil/EmptyChunk.java b/anvil-loader/src/main/java/mc/world/anvil/EmptyChunk.java
new file mode 100644
index 0000000..0ff6a8f
--- /dev/null
+++ b/anvil-loader/src/main/java/mc/world/anvil/EmptyChunk.java
@@ -0,0 +1,153 @@
+package mc.world.anvil;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import mc.core.world.Biome;
+import mc.core.world.block.Block;
+import mc.core.world.block.BlockLocation;
+import mc.core.world.block.BlockType;
+import mc.core.world.chunk.Chunk;
+import mc.core.world.chunk.ChunkSection;
+
+import java.util.LinkedList;
+import java.util.List;
+
+@Getter
+public class EmptyChunk implements Chunk {
+    private int x;
+    private int z;
+    private List<ChunkSection> $sections = new LinkedList<>();
+
+    public EmptyChunk(int x, int z) {
+        this.x = x;
+        this.z = z;
+
+        for (int i = 0; i < 16; i++) {
+            this.$sections.add(null);
+        }
+    }
+
+    @Override
+    public ChunkSection getChunkSection(int height) {
+        ChunkSection section;
+        if ((section = $sections.get(height)) == null) {
+            section = new EmptySection(height);
+            $sections.set(height, section);
+        }
+
+        return section;
+    }
+
+    @Override
+    public void setChunkSection(int height, ChunkSection chunkSection) {
+    }
+
+    @Override
+    public Block getBlock(int x, int y, int z) {
+        return getChunkSection(y >> 4).getBlock(
+                x - getX() << 4,
+                y - (y >> 4) << 4,
+                z - getZ() << 4
+        );
+    }
+
+    @Override
+    public void setBlock(Block block) {
+    }
+
+    @Override
+    public int getSkyLight(int x, int y, int z) {
+        return getChunkSection(y >> 4).getSkyLight(x, y, z);
+    }
+
+    @Override
+    public void setSkyLight(int x, int y, int z, int lightLevel) {
+    }
+
+    @Override
+    public int getAddition(int x, int y, int z) {
+        return getChunkSection(y >> 4).getAddition(x, y, z);
+    }
+
+    @Override
+    public void setAddition(int x, int y, int z, int value) {
+    }
+
+    @Override
+    public Biome getBiome(int x, int z) {
+        return Biome.PLAINS;
+    }
+
+    @Override
+    public void setBiome(int x, int z, Biome biome) {
+    }
+
+    @NoArgsConstructor
+    @Getter
+    public class EmptySection implements ChunkSection {
+        private int y;
+
+        EmptySection(int y) {
+            this.y = y;
+        }
+
+        @Override
+        public Chunk getParent() {
+            return EmptyChunk.this;
+        }
+
+        @Override
+        public void setParent(Chunk chunk) {
+        }
+
+        @Override
+        public Block getBlock(int localX, int localY, int localZ) {
+            return new Block() {
+                @Override
+                public int getLight() {
+                    return 15;
+                }
+
+                @Override
+                public void setLight(int light) {
+                }
+
+                @Override
+                public BlockType getType() {
+                    return BlockType.AIR;
+                }
+
+                @Override
+                public BlockLocation getLocation() {
+                    return new BlockLocation(
+                            (getParent().getX() << 4) + localX,
+                            (getY() << 4) + localY,
+                            (getParent().getZ() << 4) + localZ
+                    );
+                }
+            };
+        }
+
+        @Override
+        public void setBlock(Block block) {
+        }
+
+        @Override
+        public int getSkyLight(int localX, int localY, int localZ) {
+            return 15;
+        }
+
+        @Override
+        public void setSkyLight(int localX, int localY, int localZ, int lightLevel) {
+        }
+
+        @Override
+        public int getAddition(int localX, int localY, int localZ) {
+            return 0;
+        }
+
+        @Override
+        public void setAddition(int localX, int localY, int localZ, int value) {
+        }
+    }
+}
diff --git a/anvil-loader/src/main/java/mc/world/anvil/LevelInfo.java b/anvil-loader/src/main/java/mc/world/anvil/LevelInfo.java
new file mode 100644
index 0000000..a2da8ba
--- /dev/null
+++ b/anvil-loader/src/main/java/mc/world/anvil/LevelInfo.java
@@ -0,0 +1,26 @@
+package mc.world.anvil;
+
+import com.flowpowered.nbt.*;
+import lombok.Getter;
+import lombok.ToString;
+import mc.core.world.block.BlockLocation;
+
+@Getter
+@ToString
+class LevelInfo {
+    private long seed;
+    private BlockLocation spawn;
+    private int version;
+
+    LevelInfo(CompoundTag levelDatTag) {
+        CompoundMap dataMapTag = ((CompoundTag) levelDatTag.getValue().get("Data")).getValue();
+
+        seed = ((LongTag) dataMapTag.get("RandomSeed")).getValue();
+        spawn = new BlockLocation(
+                ((IntTag) dataMapTag.get("SpawnX")).getValue(),
+                ((IntTag) dataMapTag.get("SpawnY")).getValue(),
+                ((IntTag) dataMapTag.get("SpawnZ")).getValue()
+        );
+        version = ((IntTag) dataMapTag.get("version")).getValue();
+    }
+}
diff --git a/anvil-loader/src/main/java/mc/world/anvil/Region.java b/anvil-loader/src/main/java/mc/world/anvil/Region.java
new file mode 100644
index 0000000..b171aee
--- /dev/null
+++ b/anvil-loader/src/main/java/mc/world/anvil/Region.java
@@ -0,0 +1,108 @@
+package mc.world.anvil;
+
+import com.flowpowered.nbt.CompoundTag;
+import com.flowpowered.nbt.Tag;
+import com.flowpowered.nbt.stream.NBTInputStream;
+import gnu.trove.list.TByteList;
+import gnu.trove.list.array.TByteArrayList;
+import lombok.extern.slf4j.Slf4j;
+import mc.core.world.chunk.Chunk;
+
+import javax.annotation.Nullable;
+import java.io.*;
+import java.util.zip.InflaterInputStream;
+
+@Slf4j
+class Region implements Closeable {
+    private static final byte BYTE_TRUE = 1,
+                              BYTE_FALSE = 0;
+
+    private RandomAccessFile file;
+    private TByteList sectorFree;
+    private final int[] offsets = new int[1024];
+
+    Region(File file) throws IOException {
+        this.file = new RandomAccessFile(file, "rw");
+
+        int sizeOfSectorFree = (int)this.file.length() / 4096;
+        sectorFree = new TByteArrayList(sizeOfSectorFree);
+
+        sectorFree.add(BYTE_FALSE);
+        sectorFree.add(BYTE_FALSE);
+        for (int i = 0; i < sizeOfSectorFree-2; i++) {
+            sectorFree.add(BYTE_TRUE);
+        }
+
+        for (int i = 0; i < offsets.length; ++i) {
+            int read = this.file.readInt();
+            offsets[i] = read;
+
+            if (read != 0 && (read >> 8) + (read & 255) <= this.sectorFree.size()) {
+                for (int j = 0; j < (read & 255); ++j) {
+                    this.sectorFree.set((read >> 8) + j, BYTE_FALSE);
+                }
+            }
+        }
+
+        this.file.skipBytes(1024);
+    }
+
+    @Nullable
+    Chunk getChunk(int x, int z) {
+        int offset;
+        try {
+            offset = getOffset(x & 31, z & 31);
+        } catch (Exception e) {
+            return new EmptyChunk(x, z);
+        }
+
+        if (offset == 0) {
+            return new EmptyChunk(x, z);
+        }
+
+        int v1 = offset >> 8;
+        int v2 = offset & 255;
+
+        if (v1 + v2 > sectorFree.size()) {
+            return new EmptyChunk(x, z);
+        }
+
+        try {
+            file.seek((long) (v1 * 4096));
+            int read = file.readInt();
+            if (read <= 0 || read > 4096 * v2) {
+                return new EmptyChunk(x, z);
+            }
+
+            boolean gzippedData = (file.readByte() == 0x01);
+
+            if (gzippedData) {
+                log.warn("GZipped");
+            } else {
+                byte[] buffer = new byte[read - 1];
+                file.read(buffer);
+                InflaterInputStream inputStream = new InflaterInputStream(new ByteArrayInputStream(buffer));
+
+                NBTInputStream nbtInputStream = new NBTInputStream(inputStream, false);
+
+                Tag rootTag = nbtInputStream.readTag();
+                nbtInputStream.close();
+                return new AnvilChunk((CompoundTag) rootTag);
+            }
+        } catch (IOException e) {
+            log.error("Get chunk", e);
+            return null;
+        }
+
+        return null;
+    }
+
+    private int getOffset(int x, int z) {
+        return offsets[x + z * 32];
+    }
+
+    @Override
+    public void close() throws IOException {
+        if (file != null) file.close();
+    }
+}
diff --git a/anvil-loader/src/main/java/mc/world/anvil/RegionManager.java b/anvil-loader/src/main/java/mc/world/anvil/RegionManager.java
new file mode 100644
index 0000000..b0cdb50
--- /dev/null
+++ b/anvil-loader/src/main/java/mc/world/anvil/RegionManager.java
@@ -0,0 +1,49 @@
+package mc.world.anvil;
+
+import gnu.trove.map.TIntObjectMap;
+import gnu.trove.map.hash.TIntObjectHashMap;
+import lombok.extern.slf4j.Slf4j;
+import mc.core.utils.CompactedCoords;
+import org.springframework.lang.Nullable;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+@Slf4j
+public class RegionManager {
+    private final Path regionFilesPath;
+    private final TIntObjectMap<Region> regions = new TIntObjectHashMap<>();
+
+    public RegionManager(String regionFilesPath) {
+        this(Paths.get(regionFilesPath));
+    }
+
+    public RegionManager(Path regionFilesPath) {
+        this.regionFilesPath = regionFilesPath;
+    }
+
+    @Nullable
+    public Region getRegion(int x, int z) {
+        final int xz = CompactedCoords.compressXZ(x, z);
+
+        if (regions.containsKey(xz)) {
+            return regions.get(xz);
+        } else {
+            Path regionFilePath = regionFilesPath.resolve("r." + x + "." + z + ".mca");
+            if (Files.exists(regionFilePath)) {
+                try {
+                    Region region = new Region(regionFilePath.toFile());
+                    regions.put(xz, region);
+                    return region;
+                } catch (IOException e) {
+                    log.error("load region from file", e);
+                    return null;
+                }
+            } else {
+                return null;
+            }
+        }
+    }
+}
diff --git a/anvil-loader/src/test/java/mc/world/anvil/RegionTest.java b/anvil-loader/src/test/java/mc/world/anvil/RegionTest.java
new file mode 100644
index 0000000..81e6caf
--- /dev/null
+++ b/anvil-loader/src/test/java/mc/world/anvil/RegionTest.java
@@ -0,0 +1,213 @@
+package mc.world.anvil;
+
+import com.flowpowered.nbt.CompoundMap;
+import com.flowpowered.nbt.CompoundTag;
+import com.flowpowered.nbt.IntTag;
+import com.flowpowered.nbt.StringTag;
+import lombok.SneakyThrows;
+import mc.core.world.block.Block;
+import mc.core.world.block.BlockType;
+import mc.core.world.chunk.Chunk;
+import mc.core.world.chunk.ChunkSection;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+class RegionTest {
+    private static RegionManager regionManager;
+
+    @BeforeAll
+    @SneakyThrows
+    static void before() {
+        regionManager = new RegionManager(Paths.get(RegionTest.class.getResource("/region/").toURI()));
+    }
+
+    private static void assertZeroPlast(int x, int z, Block block, String msg) {
+        // @formatter:off
+        if      (x ==  0 && z ==  0) assertEquals(BlockType.STONE, block.getType(), msg);
+        else if (x == 15 && z ==  0) assertEquals(BlockType.GRANITE, block.getType(), msg);
+        else if (x ==  0 && z == 15) assertEquals(BlockType.POLISHED_GRANITE, block.getType(), msg);
+        else if (x == 15 && z == 15) assertEquals(BlockType.DIORITE, block.getType(), msg);
+        else                         assertEquals(BlockType.BEDROCK, block.getType(), msg);
+        // @formatter:on
+    }
+
+    private static ChunkChecker chunkChecker00() {
+        return new ChunkChecker() {
+            private void checkSection0(ChunkSection chunkSection) {
+                for (int y = 0; y < 16; y++) {
+                    for (int x = 0; x < 16; x++) {
+                        for (int z = 0; z < 16; z++) {
+                            Block block = chunkSection.getBlock(x, y, z);
+                            String msg = String.format("coords: %d %d %d", x, y, z);
+
+                            if (y == 0) {
+                                assertZeroPlast(x, z, block, msg);
+                            } else {
+                                assertEquals(BlockType.STONE, block.getType(), msg);
+                            }
+                        }
+                    }
+                }
+            }
+
+            private CompoundTag createExceptedNBT(Block block) {
+                CompoundMap compoundMap = new CompoundMap();
+                compoundMap.put(new IntTag("x", block.getLocation().getX()));
+                compoundMap.put(new IntTag("y", block.getLocation().getY()));
+                compoundMap.put(new IntTag("z", block.getLocation().getZ()));
+                compoundMap.put(new StringTag("id", block.getType().getNamedId()));
+
+                return new CompoundTag("", compoundMap);
+            }
+
+            private void checkSection1(ChunkSection chunkSection) {
+                for (int y = 0; y < 16; y++) {
+                    for (int x = 0; x < 16; x++) {
+                        for (int z = 0; z < 16; z++) {
+                            Block block = chunkSection.getBlock(x, y, z);
+                            String msg = String.format("coords: %d %d %d", x, y, z);
+
+                            // @formatter:off
+                            if      (y == 0) assertEquals(BlockType.DIRT, block.getType(), msg);
+                            else if (y == 1) assertEquals(BlockType.GRASS, block.getType(), msg);
+                            else if (y == 2) {
+                                if      ((x == 2 || x == 4 || x == 5) && z == 1) {
+                                    assertEquals(BlockType.CHEST_NORTH, block.getType(), msg);
+                                    assertEquals(createExceptedNBT(block), block.getNBTData());
+                                } else if ((x == 2 || x == 3 || x == 5) && z == 6) {
+                                    assertEquals(BlockType.CHEST_SOUTH, block.getType(), msg);
+                                    assertEquals(createExceptedNBT(block), block.getNBTData());
+                                } else if (x == 1 && (z == 2 || z == 3 || z == 5)) {
+                                    assertEquals(BlockType.CHEST_WEST, block.getType(), msg);
+                                    assertEquals(createExceptedNBT(block), block.getNBTData());
+                                } else if (x == 6 && (z == 2 || z == 4 || z == 5)) {
+                                    assertEquals(BlockType.CHEST_EAST, block.getType(), msg);
+                                    assertEquals(createExceptedNBT(block), block.getNBTData());
+                                } else {
+                                    assertEquals(BlockType.AIR, block.getType(), msg);
+                                }
+                            }
+                            else             assertEquals(BlockType.AIR, block.getType(), msg);
+                            // @formatter:on
+                        }
+                    }
+                }
+            }
+
+            @Override
+            public void check(Chunk chunk) {
+                ChunkSection chunkSection = chunk.getChunkSection(0);
+                assertNotNull(chunkSection);
+                checkSection0(chunkSection);
+
+                chunkSection = chunk.getChunkSection(1);
+                assertNotNull(chunkSection);
+                checkSection1(chunkSection);
+            }
+        };
+    }
+
+    private static ChunkChecker chunkChecker01() {
+        return new ChunkChecker() {
+            @Override
+            public void check(Chunk chunk) {
+                ChunkSection section = chunk.getChunkSection(0);
+                assertNotNull(section);
+
+                final List<BlockType> exceptedTypes = Arrays.asList(
+                        BlockType.CLAY,
+                        BlockType.ORE_REDSTONE,
+                        BlockType.ORE_DIAMOND,
+                        BlockType.OBSIDIAN,
+                        BlockType.STONE_MOSS,
+                        BlockType.SANDSTONE,
+                        BlockType.ORE_LAPIS,
+                        BlockType.WOOD_JUNGLE,
+                        BlockType.WOOD_BIRCH,
+                        BlockType.WOOD_SPRUCE,
+                        BlockType.WOOD_OAK,
+                        BlockType.ORE_COAL,
+                        BlockType.ORE_IRON,
+                        BlockType.ORE_GOLD,
+                        BlockType.GRAVEL,
+                        BlockType.SAND
+                );
+
+                for (int y = 0; y < 2; y++) {
+                    for (int x = 0; x < 16; x++) {
+                        for (int z = 0; z < 16; z++) {
+                            Block block = section.getBlock(x, y, z);
+                            String msg = String.format("coords: %d %d %d", x, y, z);
+
+                            if (y == 0) {
+                                assertZeroPlast(x, z, block, msg);
+                            } else {
+                                assertEquals(exceptedTypes.get(x), block.getType(), msg);
+                            }
+                        }
+                    }
+                }
+            }
+        };
+    }
+
+    private static ChunkChecker chunkChecker0N1() {
+        return new ChunkChecker() {
+            @Override
+            public void check(Chunk chunk) {
+                ChunkSection section = chunk.getChunkSection(0);
+                assertNotNull(section);
+
+                for (int y = 0; y < 1; y++) {
+                    for (int x = 0; x < 16; x++) {
+                        for (int z = 0; z < 16; z++) {
+                            assertZeroPlast(x, z,
+                                    section.getBlock(x, y, z),
+                                    String.format("coords: %d %d %d", x, y, z));
+                        }
+                    }
+                }
+            }
+        };
+    }
+
+    private static Stream<Arguments> streamArguments() {
+
+
+        return Stream.of(
+                Arguments.of(0, 0, chunkChecker00()),
+                Arguments.of(0, 1, chunkChecker01()),
+                Arguments.of(0, -1, chunkChecker0N1())
+        );
+    }
+
+    @DisplayName("testGetChunk")
+    @ParameterizedTest(name = "[{index}] chunk {0},{1}")
+    @MethodSource("streamArguments")
+    void testGetChunk(int chunkX, int chunkZ, ChunkChecker chunkChecker) {
+        final Region region = regionManager.getRegion(chunkX >> 5, chunkZ >> 5);
+        assertNotNull(region);
+
+        final Chunk chunk = region.getChunk(chunkX, chunkZ);
+        assertNotNull(chunk);
+        assertFalse(chunk instanceof EmptyChunk);
+
+        chunkChecker.check(chunk);
+    }
+
+    interface ChunkChecker {
+        void check(Chunk chunk);
+    }
+}
diff --git a/anvil-loader/src/test/resources/region/r.0.-1.mca b/anvil-loader/src/test/resources/region/r.0.-1.mca
new file mode 100644
index 0000000..25001f9
Binary files /dev/null and b/anvil-loader/src/test/resources/region/r.0.-1.mca differ
diff --git a/anvil-loader/src/test/resources/region/r.0.0.mca b/anvil-loader/src/test/resources/region/r.0.0.mca
new file mode 100644
index 0000000..853add5
Binary files /dev/null and b/anvil-loader/src/test/resources/region/r.0.0.mca differ
diff --git a/build.gradle b/build.gradle
index 79135ae..676a480 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,8 +5,8 @@ buildscript {
     repositories {
         maven { url "https://plugins.gradle.org/m2/" }
     }
-    dependencies { 
-        classpath (group: 'org.sonarsource.scanner.gradle', name: 'sonarqube-gradle-plugin', version: '2.6.2') 
+    dependencies {
+        classpath (group: 'org.sonarsource.scanner.gradle', name: 'sonarqube-gradle-plugin', version: '2.6.2')
     }
 }
 
@@ -44,7 +44,7 @@ subprojects {
     ext {
         slf4j_version  = '1.7.25'
         spring_version = '5.1.0.RELEASE'
-        lombok_version = '1.18.2'
+        lombok_version = '1.18.4'
         junit_version  = '5.3.1'
     }
 
@@ -65,13 +65,14 @@ subprojects {
 
         /* Lombok */
         annotationProcessor (group: 'org.projectlombok', name: 'lombok', version: lombok_version)
-        compileOnly (group: 'org.projectlombok', name: 'lombok', version: lombok_version)
+        compile (group: 'org.projectlombok', name: 'lombok', version: lombok_version)
         testAnnotationProcessor (group: 'org.projectlombok', name: 'lombok', version: lombok_version)
-        testCompileOnly (group: 'org.projectlombok', name: 'lombok', version: lombok_version)
+        testCompile (group: 'org.projectlombok', name: 'lombok', version: lombok_version)
 
         /* Testing */
         testImplementation (group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: junit_version)
         testRuntimeOnly(group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: junit_version)
+        testImplementation(group: 'org.junit.jupiter', name: 'junit-jupiter-params', version: junit_version)
         testCompile (group: 'org.slf4j', name: 'slf4j-simple', version: slf4j_version)
         testCompile (group: 'org.mockito', name: 'mockito-core', version: '1.10.19')
         testCompile (group: 'org.springframework', name: 'spring-test', version: spring_version)
diff --git a/core/src/main/java/mc/core/CoreEventListener.java b/core/src/main/java/mc/core/CoreEventListener.java
index 25318ba..cb2fd1e 100644
--- a/core/src/main/java/mc/core/CoreEventListener.java
+++ b/core/src/main/java/mc/core/CoreEventListener.java
@@ -23,9 +23,11 @@ public class CoreEventListener {
     public void handlerPlayerMoveEvent(CS_PlayerMoveEvent event) {
         Chunk chunk;
         chunk = event.getPlayer().getWorld().getChunk(event.getOldLocation().toBlockLocation()); // Old chunk
+        if (chunk == null) return;
         int ccX = chunk.getX();
         int ccZ = chunk.getZ();
         chunk = event.getPlayer().getWorld().getChunk(event.getNewLocation().toBlockLocation()); // Next chunk
+        if (chunk == null) return;
         int ncX = chunk.getX();
         int ncZ = chunk.getZ();
 
@@ -36,21 +38,6 @@ public class CoreEventListener {
             int cMinZ = chunk.getZ() - viewDistance;
             int cMaxZ = chunk.getZ() + viewDistance;
 
-            SC_ChunkUnloadEvent eventChunkUnload = new SC_ChunkUnloadEvent(event.getPlayer());
-            Iterator<Integer> itr = event.getPlayer().getLoadedChunks().iterator();
-            while(itr.hasNext()) {
-                int compressXZ = itr.next();
-                int[] xz = CompactedCoords.uncompressXZ(compressXZ);
-                if (xz[0] > cMaxX || xz[0] < cMinX || xz[1] > cMaxZ || xz[1] < cMinZ) {
-                    eventChunkUnload.getNeedUnloadChunks().add(compressXZ);
-                    itr.remove();
-                }
-            }
-
-            if (!eventChunkUnload.getNeedUnloadChunks().isEmpty()) {
-                EventBus.getInstance().post(eventChunkUnload);
-            }
-
             SC_ChunkLoadEvent eventChunkLoad = new SC_ChunkLoadEvent(event.getPlayer());
             for (int cZ = cMinZ; cZ <= cMaxZ; cZ++) {
                 for (int cX = cMinX; cX <= cMaxX; cX++) {
@@ -67,6 +54,21 @@ public class CoreEventListener {
             if (!eventChunkLoad.getNeedLoadChunks().isEmpty()) {
                 EventBus.getInstance().post(eventChunkLoad);
             }
+
+            SC_ChunkUnloadEvent eventChunkUnload = new SC_ChunkUnloadEvent(event.getPlayer());
+            Iterator<Integer> itr = event.getPlayer().getLoadedChunks().iterator();
+            while(itr.hasNext()) {
+                int compressXZ = itr.next();
+                int[] xz = CompactedCoords.uncompressXZ(compressXZ);
+                if (xz[0] > cMaxX || xz[0] < cMinX || xz[1] > cMaxZ || xz[1] < cMinZ) {
+                    eventChunkUnload.getNeedUnloadChunks().add(compressXZ);
+                    itr.remove();
+                }
+            }
+
+            if (!eventChunkUnload.getNeedUnloadChunks().isEmpty()) {
+                EventBus.getInstance().post(eventChunkUnload);
+            }
         }
 
         event.getPlayer().getLocation().setXYZ(
diff --git a/core/src/main/java/mc/core/EntityLocation.java b/core/src/main/java/mc/core/EntityLocation.java
index e0dc571..53fadcb 100644
--- a/core/src/main/java/mc/core/EntityLocation.java
+++ b/core/src/main/java/mc/core/EntityLocation.java
@@ -4,7 +4,6 @@ import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 import mc.core.world.block.BlockLocation;
-import org.springframework.lang.Nullable;
 
 @NoArgsConstructor
 @AllArgsConstructor
diff --git a/core/src/main/java/mc/core/network/NetInputStream.java b/core/src/main/java/mc/core/network/NetInputStream.java
index 0e180f0..9262610 100644
--- a/core/src/main/java/mc/core/network/NetInputStream.java
+++ b/core/src/main/java/mc/core/network/NetInputStream.java
@@ -1,5 +1,6 @@
 package mc.core.network;
 
+import com.flowpowered.nbt.Tag;
 import lombok.Getter;
 import lombok.Setter;
 import org.jetbrains.annotations.NotNull;
@@ -30,6 +31,7 @@ public abstract class NetInputStream extends InputStream {
     public abstract double readDouble();
     public abstract String readString();
     public abstract UUID readUUID();
+    public abstract Tag<?> readNBT();
 
     public abstract void skipBytes(int count);
 
diff --git a/core/src/main/java/mc/core/network/NetOutputStream.java b/core/src/main/java/mc/core/network/NetOutputStream.java
index b7bf437..2f29ca5 100644
--- a/core/src/main/java/mc/core/network/NetOutputStream.java
+++ b/core/src/main/java/mc/core/network/NetOutputStream.java
@@ -1,5 +1,7 @@
 package mc.core.network;
 
+import com.flowpowered.nbt.Tag;
+
 import java.io.IOException;
 import java.io.OutputStream;
 import java.util.UUID;
@@ -20,6 +22,7 @@ public abstract class NetOutputStream extends OutputStream {
     public abstract void writeDouble(double value);
     public abstract void writeString(String value);
     public abstract void writeUUID(UUID uuid);
+    public abstract void writeNBT(Tag<?> tag);
 
     @Override
     public void write(int b) throws IOException {
diff --git a/core/src/main/java/mc/core/utils/CompactedCoords.java b/core/src/main/java/mc/core/utils/CompactedCoords.java
index cac3db6..c05884c 100644
--- a/core/src/main/java/mc/core/utils/CompactedCoords.java
+++ b/core/src/main/java/mc/core/utils/CompactedCoords.java
@@ -14,15 +14,9 @@ public class CompactedCoords {
     }
 
     public static int[] uncompressXZ(int compactValue) {
-        //TODO не нравится мне такие костыли
         return new int[]{
-                (int)(short) (compactValue >> 16),
-                (int)(short) (compactValue | 0xFFFF0000)
+                compactValue >> 16,
+                (compactValue & 0x8000) > 0 ? compactValue | 0xFFFF0000 : compactValue & 0xFFFF
         };
     }
-
-    private static int floor_double(double value) {
-        int i = (int)value;
-        return value < (double)i ? i - 1 : i;
-    }
 }
diff --git a/core/src/main/java/mc/core/utils/NibbleArray.java b/core/src/main/java/mc/core/utils/NibbleArray.java
new file mode 100644
index 0000000..e8514f7
--- /dev/null
+++ b/core/src/main/java/mc/core/utils/NibbleArray.java
@@ -0,0 +1,65 @@
+package mc.core.utils;
+
+import lombok.RequiredArgsConstructor;
+import mc.core.world.block.BlockLocation;
+
+/**
+ * Сжатый массив значений 0-15
+ */
+@RequiredArgsConstructor
+public class NibbleArray {
+    private final byte[] data;
+
+    public NibbleArray(int capacity) {
+        this.data = new byte[capacity];
+    }
+
+    public NibbleArray() {
+        this.data = new byte[2048];
+    }
+
+    private int coordsToIndex(int x, int y, int z) {
+        return y << 8 | z << 4 | x;
+    }
+
+    private int nibbleIndex(int index) {
+        return index >> 1;
+    }
+
+    private boolean isLowerNibble(int index) {
+        return (index & 1) == 0;
+    }
+
+    public int get(BlockLocation location) {
+        return get(location.getX(), location.getY(), location.getZ());
+    }
+
+    public int get(int x, int y, int z) {
+        final int idx = coordsToIndex(x, y, z);
+
+        final int ni = nibbleIndex(idx);
+        return isLowerNibble(idx) ? this.data[ni] & 0x0F : this.data[ni] >> 4 & 0x0F;
+    }
+
+    public void set(BlockLocation location, int value) {
+        set(location.getX(), location.getY(), location.getZ(), value);
+    }
+
+    public void set(int x, int y, int z, int value) {
+        if      (value <  0) value =  0;
+        else if (value > 15) value = 15;
+
+        final int idx = coordsToIndex(x, y, z);
+        final int ni = nibbleIndex(idx);
+
+        if (isLowerNibble(idx)) {
+            this.data[ni] = (byte)(value);
+        } else {
+            this.data[ni] = (byte)(this.data[ni] | value << 4);
+        }
+    }
+
+    public byte[] getRawData() {
+        return data;
+    }
+}
diff --git a/core/src/main/java/mc/core/world/Biome.java b/core/src/main/java/mc/core/world/Biome.java
index f3afc39..3f4d555 100644
--- a/core/src/main/java/mc/core/world/Biome.java
+++ b/core/src/main/java/mc/core/world/Biome.java
@@ -2,10 +2,78 @@ package mc.core.world;
 
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+import java.util.Arrays;
 
 @RequiredArgsConstructor
 public enum Biome {
-    PLAINS(1);
+    OCEAN(0),
+    PLAINS(1),
+    DESERT(2),
+    EXTREME_HILLS(3),
+    FOREST(4),
+    TAIGA(5),
+    SWAMPLAND(6),
+    RIVER(7),
+    HELL(8),
+    SKY(9),
+    FROZEN_OCEAN(10),
+    FROZEN_RIVER(11),
+    ICE_PLAINS(12),
+    ICE_MOUNTAINS(13),
+    MUSHROOM_ISLAND(14),
+    MUSHROOM_ISLAND_SHORE(15),
+    BEACH(16),
+    DESERT_HILLS(17),
+    FOREST_HILLS(18),
+    TAIGA_HILLS(19),
+    EXTREME_HILLS_EDGE(20),
+    JUNGLE(21),
+    JUNGLE_HILLS(22),
+    JUNGLE_EDGE(23),
+    DEEP_OCEAN(24),
+    STONE_BEACH(25),
+    COLD_BEACH(26),
+    BIRCH_FOREST(27),
+    BIRCH_FOREST_HILLS(28),
+    ROOFED_FOREST(29),
+    TAIGA_COLD(30),
+    TAIGA_COLD_HILLS(31),
+    REDWOOD_TAIGA(32),
+    REDWOOD_TAIGA_HILLS(33),
+    EXTREME_HILLS_WITH_TREES(34),
+    SAVANNA(35),
+    SAVANNA_ROCK(36),
+    MESA(37),
+    MESA_ROCK(38),
+    MESA_CLEAR_ROCK(39),
+    VOID(127),
+    MUTATED_PLAINS(129),
+    MUTATED_DESERT(130),
+    MUTATED_EXTREME_HILLS(131),
+    MUTATED_FOREST(132),
+    MUTATED_TAIGA(133),
+    MUTATED_SWAMPLAND(134),
+    MUTATED_ICE_FLATS(140),
+    MUTATED_JUNGLE(149),
+    MUTATED_JUNGLE_EDGE(151),
+    MUTATED_BIRCH_FOREST(155),
+    MUTATED_BIRCH_FOREST_HILLS(156),
+    MUTATED_ROOFED_FOREST(157),
+    MUTATED_TAIGA_COLD(158),
+    MUTATED_REDWOOD_TAIGA(160),
+    MUTATED_REDWOOD_TAIGA_HILLS(161),
+    MUTATED_EXTREME_HILLS_WITH_TREES(162),
+    MUTATED_SAVANNA(163),
+    MUTATED_SAVANNA_ROCK(164),
+    MUTATED_MESA(165),
+    MUTATED_MESA_ROCK(166),
+    MUTATED_MESA_CLEAR_ROCK(167);
+
+    public static Biome getById(final int id) {
+        return Arrays.stream(Biome.values()).filter(biome -> biome.id == id).findFirst().orElse(Biome.PLAINS);
+    }
 
     @Getter
     private final int id;
diff --git a/core/src/main/java/mc/core/world/World.java b/core/src/main/java/mc/core/world/World.java
index 8c91eac..dc76256 100644
--- a/core/src/main/java/mc/core/world/World.java
+++ b/core/src/main/java/mc/core/world/World.java
@@ -25,7 +25,7 @@ public interface World {
      * Получить чанк по его координатам
      * @param x chunk X
      * @param z chunk Z
-     * @return {@link Chunk}
+     * @return {@link mc.core.world.chunk.Chunk}
      */
     Chunk getChunk(int x, int z);
 
@@ -38,6 +38,12 @@ public interface World {
         return getChunk(location.getX() >> 4, location.getZ() >> 4);
     }
 
+    /**
+     * Установить чанк по координатам
+     * @param x глобальный X
+     * @param z глобальный Z
+     * @param chunk {@link mc.core.world.chunk.Chunk}
+     */
     void setChunk(int x, int z, Chunk chunk);
 
     /**
diff --git a/core/src/main/java/mc/core/world/block/AbstractBlock.java b/core/src/main/java/mc/core/world/block/AbstractBlock.java
index 1795d8e..ab57849 100644
--- a/core/src/main/java/mc/core/world/block/AbstractBlock.java
+++ b/core/src/main/java/mc/core/world/block/AbstractBlock.java
@@ -3,13 +3,11 @@ package mc.core.world.block;
 import lombok.Getter;
 import lombok.Setter;
 
+@Getter
 public abstract class AbstractBlock implements Block {
-    @Getter
     @Setter
     private BlockLocation location;
-    @Getter
     private int light = 0;
-    @Getter
     private final BlockType type;
 
     protected AbstractBlock(BlockType type) {
diff --git a/core/src/main/java/mc/core/world/block/Block.java b/core/src/main/java/mc/core/world/block/Block.java
index 24c3b4f..1774a61 100644
--- a/core/src/main/java/mc/core/world/block/Block.java
+++ b/core/src/main/java/mc/core/world/block/Block.java
@@ -1,8 +1,17 @@
 package mc.core.world.block;
 
+import com.flowpowered.nbt.CompoundTag;
+
 public interface Block {
     int getLight();
     void setLight(int light);
     BlockType getType();
     BlockLocation getLocation();
+
+    default CompoundTag getNBTData() {
+        return null;
+    }
+
+    default void setNBTData(CompoundTag nbtData) {
+    }
 }
diff --git a/core/src/main/java/mc/core/world/block/BlockFactory.java b/core/src/main/java/mc/core/world/block/BlockFactory.java
index 04d039f..2f2410a 100644
--- a/core/src/main/java/mc/core/world/block/BlockFactory.java
+++ b/core/src/main/java/mc/core/world/block/BlockFactory.java
@@ -1,5 +1,7 @@
 package mc.core.world.block;
 
+//TODO избавится от этого "аппендикса"
+@Deprecated
 public class BlockFactory {
 
     public Block create(BlockType blockType, int x, int y, int z) {
diff --git a/core/src/main/java/mc/core/world/block/BlockType.java b/core/src/main/java/mc/core/world/block/BlockType.java
index 2b3bd1f..13eb1e6 100644
--- a/core/src/main/java/mc/core/world/block/BlockType.java
+++ b/core/src/main/java/mc/core/world/block/BlockType.java
@@ -2,30 +2,514 @@ package mc.core.world.block;
 
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 
 import java.util.Arrays;
 import java.util.stream.Stream;
 
+@Slf4j
 @RequiredArgsConstructor
 public enum BlockType {
+
     AIR(0, 0),
-    STONE(1, 0),
+
+    STONE     (1, 0),
+    STONE_MOSS(48, 0),
+
+    GRANITE         (1, 1),
+    POLISHED_GRANITE(1, 2),
+
+    DIORITE(1, 3),
+    ANDESITE(1, 5),
+
     GRASS(2, 0),
+    PATH(208, 0),
+
     DIRT(3, 0),
+
+    /** Farmland, Dry, Moisture 0 */
+    FARMLAND  (60, 0),
+    /** Farmland, Dry, Moisture 1 */
+    FARMLAND_1(60, 1),
+    /** Farmland, Dry, Moisture 2 */
+    FARMLAND_2(60, 2),
+    /** Farmland, Dry, Moisture 3 */
+    FARMLAND_3(60, 3),
+    /** Farmland, Dry, Moisture 4 */
+    FARMLAND_4(60, 4),
+    /** Farmland, Dry, Moisture 5 */
+    FARMLAND_5(60, 5),
+    /** Farmland, Dry, Moisture 6 */
+    FARMLAND_6(60, 6),
+    /** Farmland, Dry, Moisture 7 */
+    FARMLAND_7(60, 7),
+
+    COBBLESTONE(4, 0),
     BEDROCK(7, 0),
-    WATER(9, 0),
-    SAND(12, 0),
-    SNOW(78, 0);
+
+    /** Water, flowing, Level 7 (Source) */
+    WATER_FLOWING   (8, 0),
+    /** Water, flowing, Level 6 */
+    WATER_FLOWING_1 (8, 1),
+    /** Water, flowing, Level 5 */
+    WATER_FLOWING_2 (8, 2),
+    /** Water, flowing, Level 4 */
+    WATER_FLOWING_3 (8, 3),
+    /** Water, flowing, Level 3 */
+    WATER_FLOWING_4 (8, 4),
+    /** Water, flowing, Level 2 */
+    WATER_FLOWING_5 (8, 5),
+    /** Water, flowing, Level 1 */
+    WATER_FLOWING_6 (8, 6),
+    /** Water, flowing, Level 0 */
+    WATER_FLOWING_7 (8, 7),
+    /** Water, flowing, Level 15 */
+    WATER_FLOWING_8 (8, 8),
+    /** Water, flowing, Level 14 */
+    WATER_FLOWING_9 (8, 9),
+    /** Water, flowing, Level 13 */
+    WATER_FLOWING_10(8, 10),
+    /** Water, flowing, Level 12 */
+    WATER_FLOWING_11(8, 11),
+    /** Water, flowing, Level 11 */
+    WATER_FLOWING_12(8, 12),
+    /** Water, flowing, Level 10 */
+    WATER_FLOWING_13(8, 13),
+    /** Water, flowing, Level 9 */
+    WATER_FLOWING_14(8, 14),
+    /** Water, flowing, Level 8 */
+    WATER_FLOWING_15(8, 15),
+
+    /** Water, still, Level 7 (Source) */
+    WATER_STILL   (9, 0),
+    /** Water, still, Level 6 */
+    WATER_STILL_1 (9, 1),
+    /** Water, still, Level 5 */
+    WATER_STILL_2 (9, 2),
+    /** Water, still, Level 4 */
+    WATER_STILL_3 (9, 3),
+    /** Water, still, Level 3 */
+    WATER_STILL_4 (9, 4),
+    /** Water, still, Level 2 */
+    WATER_STILL_5 (9, 5),
+    /** Water, still, Level 1 */
+    WATER_STILL_6 (9, 6),
+    /** Water, still, Level 0 */
+    WATER_STILL_7 (9, 7),
+    /** Water, still, Level 15 */
+    WATER_STILL_8 (9, 8),
+    /** Water, still, Level 14 */
+    WATER_STILL_9 (9, 9),
+    /** Water, still, Level 13 */
+    WATER_STILL_10(9, 10),
+    /** Water, still, Level 12 */
+    WATER_STILL_11(9, 11),
+    /** Water, still, Level 11 */
+    WATER_STILL_12(9, 12),
+    /** Water, still, Level 10 */
+    WATER_STILL_13(9, 13),
+    /** Water, still, Level 9 */
+    WATER_STILL_14(9, 14),
+    /** Water, still, Level 8 */
+    WATER_STILL_15(9, 15),
+
+    /** Lava, flowing, Level 7 (Source) */
+    LAVA_FLOWING   (10, 0),
+    /** Lava, flowing, Level 6 */
+    LAVA_FLOWING_1 (10, 1),
+    /** Lava, flowing, Level 5 */
+    LAVA_FLOWING_2 (10, 2),
+    /** Lava, flowing, Level 4 */
+    LAVA_FLOWING_3 (10, 3),
+    /** Lava, flowing, Level 3 */
+    LAVA_FLOWING_4 (10, 4),
+    /** Lava, flowing, Level 2 */
+    LAVA_FLOWING_5 (10, 5),
+    /** Lava, flowing, Level 1 */
+    LAVA_FLOWING_6 (10, 6),
+    /** Lava, flowing, Level 0 */
+    LAVA_FLOWING_7 (10, 7),
+    /** Lava, flowing, Level 15 */
+    LAVA_FLOWING_8 (10, 8),
+    /** Lava, flowing, Level 14 */
+    LAVA_FLOWING_9 (10, 9),
+    /** Lava, flowing, Level 13 */
+    LAVA_FLOWING_10(10, 10),
+    /** Lava, flowing, Level 12 */
+    LAVA_FLOWING_11(10, 11),
+    /** Lava, flowing, Level 11 */
+    LAVA_FLOWING_12(10, 12),
+    /** Lava, flowing, Level 10 */
+    LAVA_FLOWING_13(10, 13),
+    /** Lava, flowing, Level 9 */
+    LAVA_FLOWING_14(10, 14),
+    /** Lava, flowing, Level 8 */
+    LAVA_FLOWING_15(10, 15),
+
+    /** Lava, still, Level 7 (Source) */
+    LAVA_STILL   (11, 0),
+    /** Lava, still, Level 6 */
+    LAVA_STILL_1 (11, 1),
+    /** Lava, still, Level 5 */
+    LAVA_STILL_2 (11, 2),
+    /** Lava, still, Level 4 */
+    LAVA_STILL_3 (11, 3),
+    /** Lava, still, Level 3 */
+    LAVA_STILL_4 (11, 4),
+    /** Lava, still, Level 2 */
+    LAVA_STILL_5 (11, 5),
+    /** Lava, still, Level 1 */
+    LAVA_STILL_6 (11, 6),
+    /** Lava, still, Level 0 */
+    LAVA_STILL_7 (11, 7),
+    /** Lava, still, Level 15 */
+    LAVA_STILL_8 (11, 8),
+    /** Lava, still, Level 14 */
+    LAVA_STILL_9 (11, 9),
+    /** Lava, still, Level 13 */
+    LAVA_STILL_10(11, 10),
+    /** Lava, still, Level 12 */
+    LAVA_STILL_11(11, 11),
+    /** Lava, still, Level 11 */
+    LAVA_STILL_12(11, 12),
+    /** Lava, still, Level 10 */
+    LAVA_STILL_13(11, 13),
+    /** Lava, still, Level 9 */
+    LAVA_STILL_14(11, 14),
+    /** Lava, still, Level 8 */
+    LAVA_STILL_15(11, 15),
+
+    SAND     (12, 0),
+    SANDSTONE(24, 0),
+
+    GRAVEL(13, 0),
+
+    ORE_GOLD            (14, 0),
+    ORE_IRON            (15, 0),
+    ORE_COAL            (16, 0),
+    ORE_LAPIS           (21, 0),
+    ORE_DIAMOND         (56, 0),
+    ORE_REDSTONE        (73, 0),
+    ORE_GLOWING_REDSTONE(74, 0),
+    ORE_EMERALD         (129, 0),
+
+    // Upright
+    WOOD_OAK     (17, 0),
+    WOOD_SPRUCE  (17, 1),
+    WOOD_BIRCH   (17, 2),
+    WOOD_JUNGLE  (17, 3),
+    WOOD_ACACIA  (162, 0),
+    WOOD_OAK_DARK(162, 1),
+
+    // East/West
+    WOOD_OAK_EW     (17, 4),
+    WOOD_SPRUCE_EW  (17, 5),
+    WOOD_BIRCH_EW   (17, 6),
+    WOOD_JUNGLE_EW  (17, 7),
+    WOOD_ACACIA_EW  (162, 4),
+    WOOD_OAK_DARK_EW(162, 5),
+
+    // North/South
+    WOOD_OAK_NS     (17, 8),
+    WOOD_SPRUCE_NS  (17, 9),
+    WOOD_BIRCH_NS   (17, 10),
+    WOOD_JUNGLE_NS  (17, 11),
+    WOOD_ACACIA_NS  (162, 8),
+    WOOD_OAK_DARK_NS(162, 9),
+
+    PLANK_WOOD_OAK     (5, 0),
+    PLANK_WOOD_SPRUCE  (5, 1),
+    PLANK_WOOD_BIRCH   (5, 2),
+    PLANK_WOOD_JUNGLE  (5, 3),
+    PLANK_WOOD_ACACIA  (5, 4),
+    PLANK_WOOD_OAK_DARK(5, 5),
+
+    DOOR_LOW_OAK_EAST(64, 0),
+    DOOR_LOW_OAK_SOUTH(64, 1),
+    DOOR_LOW_OAK_WEST(64, 2),
+    DOOR_LOW_OAK_NORTH(64, 3),
+    DOOR_LOW_OAK_EAST_OPENED(64, 4),
+    DOOR_LOW_OAK_SOUTH_OPENED(64, 5),
+    DOOR_LOW_OAK_WEST_OPENED(64, 6),
+    DOOR_LOW_OAK_NORTH_OPENED(64, 7),
+
+    DOOR_UP_OAK_LEFT(64, 8),
+    DOOR_UP_OAK_RIGHT(64, 9),
+    DOOR_UP_OAK_LEFT_POWERED(64, 10),
+    DOOR_UP_OAK_RIGHT_POWERED(64, 11),
+    DOOR_UP_OAK_12(64, 12),
+    DOOR_UP_OAK_13(64, 13),
+    DOOR_UP_OAK_14(64, 14),
+    DOOR_UP_OAK_15(64, 15),
+
+    FENCE_OAK(85, 0),
+
+    // Decay after Tree Update
+    LEAVES_OAK     (18, 0),
+    LEAVES_SPRUCE  (18, 1),
+    LEAVES_BIRCH   (18, 2),
+    LEAVES_JUNGLE  (18, 3),
+    LEAVES_ACACIA  (161, 0),
+    LEAVES_OAK_DARK(161, 1),
+
+    // No Decay
+    LEAVES_OAK2     (18, 4),
+    LEAVES_SPRUCE2  (18, 5),
+    LEAVES_BIRCH2   (18, 6),
+    LEAVES_JUNGLE2  (18, 7),
+    LEAVES_ACACIA2  (161, 4),
+    LEAVES_OAK_DARK2(161, 5),
+
+    // Decay
+    LEAVES_OAK3     (18, 8),
+    LEAVES_SPRUCE3  (18, 9),
+    LEAVES_BIRCH3   (18, 10),
+    LEAVES_JUNGLE3  (18, 11),
+    LEAVES_ACACIA3  (161, 8),
+    LEAVES_OAK_DARK3(161, 9),
+
+    // No decay, unused
+    @Deprecated
+    LEAVES_OAK4     (18, 12),
+    @Deprecated
+    LEAVES_SPRUCE4  (18, 13),
+    @Deprecated
+    LEAVES_BIRCH4   (18, 14),
+    @Deprecated
+    LEAVES_JUNGLE4  (18, 15),
+    @Deprecated
+    LEAVES_ACACIA4  (161, 12),
+    @Deprecated
+    LEAVES_OAK_DARK4(161, 13),
+
+    COBWEB(30, 0),
+    TALLGRASS(31, 1),
+    DANDELION(37, 0),
+
+    FLOWER_POPPY       (38, 0),
+    FLOWER_BLUE_ORCHID (38, 1),
+    FLOWER_ALLIUM      (38, 2),
+    FLOWER_AZURE_BLUET (38, 3),
+    FLOWER_TULIP_RED   (38, 4),
+    FLOWER_TULIP_ORANGE(38, 5),
+    FLOWER_TULIP_WHITE (38, 6),
+    FLOWER_TULIP_PINK  (38, 7),
+    FLOWER_OXEYE_DAISY (38, 8),
+
+    MUSHROOM_BROWN(39, 0),
+    MUSHROOM_RED  (40, 0),
+
+    MUSHROOM_BLOCK_BROWN_ALL_INSIDE(99, 0),
+    MUSHROOM_BLOCK_BROWN_NW        (99, 1),
+    MUSHROOM_BLOCK_BROWN_NORT      (99, 2),
+    MUSHROOM_BLOCK_BROWN_NE        (99, 3),
+    MUSHROOM_BLOCK_BROWN_WEST      (99, 4),
+    MUSHROOM_BLOCK_BROWN_CENTER    (99, 5),
+    MUSHROOM_BLOCK_BROWN_EAST      (99, 6),
+    MUSHROOM_BLOCK_BROWN_SW        (99, 7),
+    MUSHROOM_BLOCK_BROWN_SOUTH     (99, 8),
+    MUSHROOM_BLOCK_BROWN_SE        (99, 9),
+    MUSHROOM_BLOCK_BROWN_STEM      (99, 10),
+    MUSHROOM_BLOCK_BROWN_ALL_OUSIDE(99, 14),
+    MUSHROOM_BLOCK_BROWN_ALL_STEM  (99, 15),
+
+    MUSHROOM_BLOCK_RED_ALL_INSIDE(100, 0),
+    MUSHROOM_BLOCK_RED_NW        (100, 1),
+    MUSHROOM_BLOCK_RED_NORT      (100, 2),
+    MUSHROOM_BLOCK_RED_NE        (100, 3),
+    MUSHROOM_BLOCK_RED_WEST      (100, 4),
+    MUSHROOM_BLOCK_RED_CENTER    (100, 5),
+    MUSHROOM_BLOCK_RED_EAST      (100, 6),
+    MUSHROOM_BLOCK_RED_SW        (100, 7),
+    MUSHROOM_BLOCK_RED_SOUTH     (100, 8),
+    MUSHROOM_BLOCK_RED_SE        (100, 9),
+    MUSHROOM_BLOCK_RED_STEM      (100, 10),
+    MUSHROOM_BLOCK_RED_ALL_OUSIDE(100, 14),
+    MUSHROOM_BLOCK_RED_ALL_STEM  (100, 15),
+
+    OBSIDIAN(49, 0),
+
+    TORCH_EAST (50, 1),
+    TORCH_WEST (50, 2),
+    TORCH_SOUTH(50, 3),
+    TORCH_NORTH(50, 4),
+    TORCH_UP   (50, 5),
+
+    MONSTER_SPAWNER(52, 0),
+
+    CHEST_NORTH(54, 2, "minecraft:chest"),
+    CHEST_SOUTH(54, 3, "minecraft:chest"),
+    CHEST_WEST (54, 4, "minecraft:chest"),
+    CHEST_EAST (54, 5, "minecraft:chest"),
+
+    RAIL_NS             (66, 0),
+    RAIL_EW             (66, 1),
+    RAIL_ASCENDING_EAST (66, 2),
+    RAIL_ASCENDING_WEST (66, 3),
+    RAIL_ASCENDING_NORTH(66, 4),
+    RAIL_ASCENDING_SOUTH(66, 5),
+    RAIL_CURVED_SE      (66, 6),
+    RAIL_CURVED_SW      (66, 7),
+    RAIL_CURVED_NW      (66, 8),
+    RAIL_CURVED_NE      (66, 9),
+
+    SNOW(78, 0),
+
+    CLAY(82, 0),
+    CLAY_HARDENED(172, 0),
+
+    /** Sugar canes (Age 0) */
+    SUGAR_CANES(83, 0),
+    /** Sugar canes (Age 1) */
+    SUGAR_CANES_1(83, 1),
+    /** Sugar canes (Age 2) */
+    SUGAR_CANES_2(83, 2),
+    /** Sugar canes (Age 3) */
+    SUGAR_CANES_3(83, 3),
+    /** Sugar canes (Age 4) */
+    SUGAR_CANES_4(83, 4),
+    /** Sugar canes (Age 5) */
+    SUGAR_CANES_5(83, 5),
+    /** Sugar canes (Age 6) */
+    SUGAR_CANES_6(83, 6),
+    /** Sugar canes (Age 7) */
+    SUGAR_CANES_7(83, 7),
+    /** Sugar canes (Age 8) */
+    SUGAR_CANES_8(83, 8),
+    /** Sugar canes (Age 9) */
+    SUGAR_CANES_9(83, 9),
+    /** Sugar canes (Age 10) */
+    SUGAR_CANES_10(83, 10),
+    /** Sugar canes (Age 11) */
+    SUGAR_CANES_11(83, 11),
+    /** Sugar canes (Age 12) */
+    SUGAR_CANES_12(83, 12),
+    /** Sugar canes (Age 13) */
+    SUGAR_CANES_13(83, 13),
+    /** Sugar canes (Age 14) */
+    SUGAR_CANES_14(83, 14),
+    /** Sugar canes (Age 15) */
+    SUGAR_CANES_15(83, 15),
+
+    PUMPKIN_SOUTH(86, 0),
+    PUMPKIN_WEST (86, 1),
+    PUMPKIN_NORTH(86, 2),
+    PUMPKIN_EAST (86, 3),
+
+    STONE_MONSTER_EGG(97, 0),
+
+    GLASS_PANE(102, 0),
+
+    VINE      (106, 0),
+    VINE_SOUTH(106, 1),
+    VINE_WEST (106, 2),
+    VINE_SW   (106, 3),
+    VINE_NORTH(106, 4),
+    VINE_NS   (106, 5),
+    VINE_NW   (106, 6),
+    VINE_NSW  (106, 7), // North, South, West
+    VINE_EAST (106, 8),
+    VINE_ES   (106, 9),
+    VINE_EW   (106, 10),
+    VINE_ESW  (106, 11),
+    VINE_EN   (106, 12),
+    VINE_ENS  (106, 13),
+    VINE_ENW  (106, 14),
+    VINE_ENSW (106, 14),
+
+    WATERLILY(111, 0),
+
+    LILAC(175, 1),
+    DOUBLE_TALLGRASS(175, 2),
+    ROSE_BUSH(175, 4),
+    PEONY(175, 5),
+    ROSE_BUSH_10(175, 10),
+
+    /** Wheat (Age 0) */
+    WHEAT  (59, 0),
+    /** Wheat (Age 1) */
+    WHEAT_1(59, 1),
+    /** Wheat (Age 2) */
+    WHEAT_2(59, 2),
+    /** Wheat (Age 3) */
+    WHEAT_3(59, 3),
+    /** Wheat (Age 4) */
+    WHEAT_4(59, 4),
+    /** Wheat (Age 5) */
+    WHEAT_5(59, 5),
+    /** Wheat (Age 6) */
+    WHEAT_6(59, 6),
+    /** Wheat (Age 7) */
+    WHEAT_7(59, 7),
+
+    /** Carrots (Age 0) */
+    CARROTS(141, 0),
+    /** Carrots (Age 1) */
+    CARROTS_1(141, 1),
+    /** Carrots (Age 2) */
+    CARROTS_2(141, 2),
+    /** Carrots (Age 3) */
+    CARROTS_3(141, 3),
+    /** Carrots (Age 4) */
+    CARROTS_4(141, 4),
+    /** Carrots (Age 5) */
+    CARROTS_5(141, 5),
+    /** Carrots (Age 6) */
+    CARROTS_6(141, 6),
+    /** Carrots (Age 7) */
+    CARROTS_7(141, 7),
+
+    /** Potatoes (Age 0) */
+    POTATOES (142, 0),
+    /** Potatoes (Age 1) */
+    POTATOES_1(142, 1),
+    /** Potatoes (Age 2) */
+    POTATOES_2(142, 2),
+    /** Potatoes (Age 3) */
+    POTATOES_3(142, 3),
+    /** Potatoes (Age 4) */
+    POTATOES_4(142, 4),
+    /** Potatoes (Age 5) */
+    POTATOES_5(142, 5),
+    /** Potatoes (Age 6) */
+    POTATOES_6(142, 6),
+    /** Potatoes (Age 7) */
+    POTATOES_7(142, 7),
+
+    /** Beetroot (Age 0) */
+    BEETROOT  (207, 0),
+    /** Beetroot (Age 1) */
+    BEETROOT_1(207, 1),
+    /** Beetroot (Age 2) */
+    BEETROOT_2(207, 2),
+    /** Beetroot (Age 3) */
+    BEETROOT_3(207, 3);
+
+    BlockType(int id, int meta) {
+        this.id = id;
+        this.meta = meta;
+        this.namedId = null;
+    }
 
     public static BlockType getByIdMeta(int id, int meta) {
+        if (id < 0) {
+            log.warn("Incorrect id \"{}\"", id);
+            return BEDROCK;
+        }
+
         Stream<BlockType> stream = Arrays.stream(BlockType.values());
         return stream.filter(blockType -> blockType.id == id && blockType.meta == meta)
                      .findFirst()
-                     .orElse(BlockType.AIR);
+                     .orElseGet(() -> {
+                         log.warn("Unknow block type: {}:{}", id, meta);
+                         return BEDROCK;
+                     });
     }
 
     @Getter
     private final int id;
     @Getter
     private final int meta;
+    @Getter
+    private final String namedId;
 }
diff --git a/core/src/main/java/mc/core/world/chunk/Chunk.java b/core/src/main/java/mc/core/world/chunk/Chunk.java
index d096646..4266487 100644
--- a/core/src/main/java/mc/core/world/chunk/Chunk.java
+++ b/core/src/main/java/mc/core/world/chunk/Chunk.java
@@ -3,11 +3,32 @@ package mc.core.world.chunk;
 import mc.core.world.Biome;
 import mc.core.world.block.Block;
 
+/* 16x256x16 */
 public interface Chunk {
+    /**
+     * Глобальная координата X
+     * @return
+     */
     int getX();
+
+    /**
+     * Глобальная координата Z
+     * @return
+     */
     int getZ();
 
+    /**
+     * Получить секцию чанка
+     * @param height высота (0-15)
+     * @return {@link mc.core.world.chunk.ChunkSection}
+     */
     ChunkSection getChunkSection(int height);
+
+    /**
+     * Установить секцию чанка
+     * @param height высота (0-15)
+     * @param chunkSection {@link mc.core.world.chunk.ChunkSection}
+     */
     void setChunkSection(int height, ChunkSection chunkSection);
 
     /**
@@ -30,8 +51,15 @@ public interface Chunk {
      * Получить тип биома по глобальным координатам
      * @param x global X
      * @param z global Z
-     * @return
+     * @return {@link mc.core.world.Biome}
      */
     Biome getBiome(int x, int z);
+
+    /**
+     * Указать данные по биому
+     * @param x global X
+     * @param z global Z
+     * @param biome {@link mc.core.world.Biome}
+     */
     void setBiome(int x, int z, Biome biome);
 }
diff --git a/core/src/main/java/mc/core/world/chunk/ChunkProvider.java b/core/src/main/java/mc/core/world/chunk/ChunkProvider.java
index 4726b63..d363fdb 100644
--- a/core/src/main/java/mc/core/world/chunk/ChunkProvider.java
+++ b/core/src/main/java/mc/core/world/chunk/ChunkProvider.java
@@ -1,6 +1,12 @@
 package mc.core.world.chunk;
 
 public interface ChunkProvider {
+    /**
+     * Получить чанк по координатам
+     * @param x глобальный X
+     * @param z глобальный Z
+     * @return {@link mc.core.world.chunk.Chunk}
+     */
     Chunk getChunk(int x , int z);
 
     void saveChunk(Chunk chunk);
diff --git a/core/src/main/java/mc/core/world/chunk/ChunkSection.java b/core/src/main/java/mc/core/world/chunk/ChunkSection.java
index 194f520..ebe5cd8 100644
--- a/core/src/main/java/mc/core/world/chunk/ChunkSection.java
+++ b/core/src/main/java/mc/core/world/chunk/ChunkSection.java
@@ -9,6 +9,10 @@ public interface ChunkSection {
     Chunk getParent();
     void setParent(Chunk chunk);
 
+    /**
+     * Высота
+     * @return
+     */
     int getY();
 
     /**
@@ -19,9 +23,29 @@ public interface ChunkSection {
      * @return {@link Block}
      */
     Block getBlock(int localX, int localY, int localZ);
+
+    /**
+     * Установить блок
+     * @param block {@link mc.core.world.block.Block}
+     */
     void setBlock(Block block);
 
+    /**
+     * Получить данные о естественной подсветке
+     * @param localX локальный X (0-15)
+     * @param localY локальный Y (0-15)
+     * @param localZ локальный Z (0-15)
+     * @return integer значение 0-15, где 0 - это света нет, а 15 - получает прямой солнечный свет
+     */
     int getSkyLight(int localX, int localY, int localZ);
+
+    /**
+     * Указать данные о естественной подсветке
+     * @param localX локальный X (0-15)
+     * @param localY локальный Y (0-15)
+     * @param localZ локальный Z (0-15)
+     * @param lightLevel значение 0-15, где 0 - это света нет, а 15 - получает прямой солнечный свет
+     */
     void setSkyLight(int localX, int localY, int localZ, int lightLevel);
 
     int getAddition(int localX, int localY, int localZ);
diff --git a/core/src/test/java/mc/core/utils/CompactedCoordsTest.java b/core/src/test/java/mc/core/utils/CompactedCoordsTest.java
index f88443e..ab75543 100644
--- a/core/src/test/java/mc/core/utils/CompactedCoordsTest.java
+++ b/core/src/test/java/mc/core/utils/CompactedCoordsTest.java
@@ -1,25 +1,37 @@
 package mc.core.utils;
 
-import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
 
-import java.util.concurrent.ThreadLocalRandom;
+import java.util.stream.Stream;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 class CompactedCoordsTest {
-    @Test
-    void compressXZ() {
-        ThreadLocalRandom random = ThreadLocalRandom.current();
+    private static Stream<Arguments> streamTestParams() {
+        return Stream.of(
+                Arguments.of(Short.MIN_VALUE, Short.MIN_VALUE),
+                Arguments.of(Short.MIN_VALUE, Short.MAX_VALUE),
+                Arguments.of(Short.MAX_VALUE, Short.MAX_VALUE),
+                Arguments.of(Short.MAX_VALUE, Short.MIN_VALUE),
+                Arguments.of(0, 0),
+                Arguments.of(-1, -1),
+                Arguments.of(-1, 1),
+                Arguments.of(1, 1),
+                Arguments.of(1, -1)
+        );
+    }
 
-        for (int i = 0; i < 100; i++) {
-            final int x = random.nextInt(Short.MIN_VALUE, Short.MAX_VALUE);
-            final int z = random.nextInt(Short.MIN_VALUE, Short.MAX_VALUE);
+    @ParameterizedTest
+    @MethodSource("streamTestParams")
+    void testCompress(int x, int z) {
+        final int compressXZ = CompactedCoords.compressXZ(x, z);
+        int[] xz = CompactedCoords.uncompressXZ(compressXZ);
 
-            final int compressXZ = CompactedCoords.compressXZ(x, z);
-            int[] xz = CompactedCoords.uncompressXZ(compressXZ);
-
-            assertEquals(x, xz[0]);
-            assertEquals(z, xz[1]);
-        }
+        assertTrue(x == xz[0] && z == xz[1],
+                   String.format("x = %d, vx = %d; z = %d, vz = %d",
+                                 x, xz[0],
+                                 z, xz[1]));
     }
 }
diff --git a/proto_1.12.2/build.gradle b/proto_1.12.2/build.gradle
index 8e3a7e2..7c71711 100644
--- a/proto_1.12.2/build.gradle
+++ b/proto_1.12.2/build.gradle
@@ -6,4 +6,5 @@ dependencies {
 
     /* Components */
     compile (group: 'com.google.code.gson', name: 'gson', version: '2.8.5')
+    compile (group: 'net.sf.trove4j', name: 'trove4j', version: '3.0.3')
 }
diff --git a/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/NetInputStream_p340.java b/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/NetInputStream_p340.java
index defdd05..6be6f48 100644
--- a/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/NetInputStream_p340.java
+++ b/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/NetInputStream_p340.java
@@ -1,18 +1,19 @@
-/*
- * DmitriyMX <dimon550@gmail.com>
- * 2018-07-25
- */
 package mc.core.network.proto_1_12_2;
 
+import com.flowpowered.nbt.Tag;
+import com.flowpowered.nbt.stream.NBTInputStream;
 import lombok.extern.slf4j.Slf4j;
 import mc.core.network.NetInputStream;
 
+import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.util.UUID;
 import java.util.concurrent.atomic.AtomicInteger;
 
 @Slf4j
 public abstract class NetInputStream_p340 extends NetInputStream {
+    private NBTInputStream nbtInputStream;
+
     @Override
     public int readVarInt(AtomicInteger countReadBytes) {
         int numRead = 0;
@@ -59,4 +60,23 @@ public abstract class NetInputStream_p340 extends NetInputStream {
     public UUID readUUID() {
         return new UUID(readLong(), readLong());
     }
+
+    @Override
+    public Tag<?> readNBT() {
+        if (nbtInputStream == null) {
+            try {
+                nbtInputStream = new NBTInputStream(this, false);
+            } catch (IOException e) {
+                log.error("Create NBT stream", e);
+                return null;
+            }
+        }
+
+        try {
+            return nbtInputStream.readTag();
+        } catch (IOException e) {
+            log.error("Read NBT", e);
+            return null;
+        }
+    }
 }
diff --git a/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/NetOutputStream_p340.java b/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/NetOutputStream_p340.java
index b4bcdbd..396ec74 100644
--- a/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/NetOutputStream_p340.java
+++ b/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/NetOutputStream_p340.java
@@ -1,13 +1,18 @@
 package mc.core.network.proto_1_12_2;
 
+import com.flowpowered.nbt.Tag;
+import com.flowpowered.nbt.stream.NBTOutputStream;
 import lombok.extern.slf4j.Slf4j;
 import mc.core.network.NetOutputStream;
 
+import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.util.UUID;
 
 @Slf4j
 public abstract class NetOutputStream_p340 extends NetOutputStream {
+    private NBTOutputStream nbtOutputStream;
+
     @Override
     public void writeVarInt(int value) {
         while ((value & -128) != 0) {
@@ -37,4 +42,22 @@ public abstract class NetOutputStream_p340 extends NetOutputStream {
         writeLong(uuid.getMostSignificantBits());
         writeLong(uuid.getLeastSignificantBits());
     }
+
+    @Override
+    public void writeNBT(Tag<?> tag) {
+        if (nbtOutputStream == null) {
+            try {
+                nbtOutputStream = new NBTOutputStream(this, false);
+            } catch (IOException e) {
+                log.error("Create NBT stream", e);
+                return;
+            }
+        }
+
+        try {
+            nbtOutputStream.writeTag(tag);
+        } catch (IOException e) {
+            log.error("Write NBT", e);
+        }
+    }
 }
diff --git a/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.java b/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.java
index a57e323..9be81ac 100644
--- a/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.java
+++ b/proto_1.12.2/src/main/java/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.java
@@ -1,16 +1,17 @@
-/*
- * DmitriyMX <dimon550@gmail.com>
- * 2018-07-21
- */
 package mc.core.network.proto_1_12_2.packets;
 
+import com.flowpowered.nbt.CompoundTag;
+import gnu.trove.list.TIntList;
+import gnu.trove.list.array.TIntArrayList;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
 import mc.core.network.NetOutputStream;
 import mc.core.network.SCPacket;
 import mc.core.network.proto_1_12_2.ByteArrayOutputNetStream;
+import mc.core.utils.NibbleArray;
 import mc.core.world.block.Block;
+import mc.core.world.block.BlockLocation;
 import mc.core.world.block.BlockType;
 import mc.core.world.chunk.Chunk;
 import mc.core.world.chunk.ChunkSection;
@@ -80,10 +81,6 @@ public class ChunkDataPacket implements SCPacket {
     private Chunk chunk;
     private List<ChunkSection> sectionList;
 
-    private int serializeBlockState(BlockType blockType) {
-        return (blockType.getId() << 4) | blockType.getMeta();
-    }
-
     public void setChunk(Chunk chunk) {
         this.sectionList = null;
         this.chunk = chunk;
@@ -96,13 +93,18 @@ public class ChunkDataPacket implements SCPacket {
 
     @Override
     public void writeSelf(NetOutputStream netStream) {
+        if (sectionList == null && chunk == null) {
+            log.warn("Empty chunk data!"); //TODO для такого нужна заглушка
+            return;
+        }
+
         netStream.writeInt(x); // Chunk X
         netStream.writeInt(z); // Chunk Y
         netStream.writeBoolean(initChunk); // Init Chunk
 
         int maxH = 0;
+        int bitMask = 0;
         if (sectionList == null && chunk != null) {
-            int bitMask = 0;
             for (int h = 15; h >= 0; h--) {
                 bitMask = bitMask << 1;
                 ChunkSection chunkSection = chunk.getChunkSection(h);
@@ -113,11 +115,8 @@ public class ChunkDataPacket implements SCPacket {
                     bitMask |= 0x00;
                 }
             }
-
-            netStream.writeVarInt(bitMask); // Primary Bit Mask
         } else if (sectionList != null && chunk == null) {
             sectionList.sort(Comparator.comparingInt(ChunkSection::getY));
-            int bitMask = 0;
             for (int h = 15, i = 0; h >= 0; h--) {
                 bitMask = bitMask << 1;
                 ChunkSection chunkSection = sectionList.get(i);
@@ -128,16 +127,15 @@ public class ChunkDataPacket implements SCPacket {
                     bitMask |= 0x00;
                 }
             }
-
-            netStream.writeVarInt(bitMask); // Primary Bit Mask
-        } else {
-            log.warn("Empty chunk data");
-            return;
         }
+        netStream.writeVarInt(bitMask); // Primary Bit Mask
 
         final ByteArrayOutputNetStream data = new ByteArrayOutputNetStream();
-        int dataItems = 0;
-        final int airBlockPalette = serializeBlockState(BlockType.AIR);
+
+        final ByteArrayOutputNetStream biomes = new ByteArrayOutputNetStream();
+        boolean biomeWrite = true;
+
+        List<CompoundTag> nbtList = new ArrayList<>();
 
         for (int h = 0; h < maxH; h++) {
             ChunkSection chunkSection = null;
@@ -152,64 +150,30 @@ public class ChunkDataPacket implements SCPacket {
                 continue;
             }
 
-            final List<Integer> palette = new ArrayList<>();
-            palette.add(airBlockPalette);
-            final ByteArrayOutputNetStream dataArray = new ByteArrayOutputNetStream();
-            final ByteArrayOutputNetStream blockLight = new ByteArrayOutputNetStream();
-            final ByteArrayOutputNetStream skyLight = new ByteArrayOutputNetStream();
-            final ByteArrayOutputNetStream biomes = new ByteArrayOutputNetStream();
-
-            long dataValueCompacted = 0;
-            int blockLightCompacted = 0;
-            int skyLightCompacted = 0;
-
-            int idxHalfLong = 0;
-            int idxHalfByte = 0;
-            boolean biomeFinally = false;
+            final PalettedChunkSection palettedChunkSection = new PalettedChunkSection();
 
             for (int y = 0; y < 16; y++) {
                 for (int z = 0; z < 16; z++) {
                     for (int x = 0; x < 16; x++) {
                         Block block = chunkSection.getBlock(x, y, z);
-                        int blockState = serializeBlockState(block.getType());
 
-                        int currentIndexPaletteBlock;
-                        if (!palette.contains(blockState)) {
-                            palette.add(blockState);
-                            currentIndexPaletteBlock = palette.size()-1;
-                        } else {
-                            currentIndexPaletteBlock = palette.indexOf(blockState);
+                        palettedChunkSection.addBlock(
+                                block,
+                                chunkSection.getSkyLight(x, y, z)
+                        );
+
+                        CompoundTag nbt = block.getNBTData();
+                        if (nbt != null) {
+                            nbtList.add(nbt);
                         }
 
-                        if (idxHalfLong == 0) {
-                            dataValueCompacted = currentIndexPaletteBlock;
-                            idxHalfLong++;
-                        } else if (idxHalfLong > 0 && idxHalfLong < 15) {
-                            dataValueCompacted = (dataValueCompacted << 4) | currentIndexPaletteBlock;
-                            idxHalfLong++;
-                        } else {
-                            dataValueCompacted = (dataValueCompacted << 4) | currentIndexPaletteBlock;
-                            dataArray.writeLong(dataValueCompacted);
-                            idxHalfLong = 0;
-                            dataItems++;
-                        }
-
-                        if (idxHalfByte == 0) {
-                            blockLightCompacted = block.getLight();
-                            skyLightCompacted = chunkSection.getSkyLight(x, y, z);
-                            idxHalfByte++;
-                        } else {
-                            blockLightCompacted = (blockLightCompacted << 4) | block.getLight();
-                            blockLight.writeByte(blockLightCompacted);
-                            skyLightCompacted = (skyLightCompacted << 4) | chunkSection.getSkyLight(x, y, z);
-                            skyLight.writeByte(skyLightCompacted);
-                            idxHalfByte = 0;
-                        }
-
-                        if (!biomeFinally) {
-                            biomes.writeByte(chunk.getBiome(x, z).getId());
+                        if (biomeWrite) {
+                            biomes.writeByte(chunk.getBiome(
+                                    (chunk.getX() << 4) + x,
+                                    (chunk.getZ() << 4) + z
+                            ).getId());
                             if (x == 15 && z == 15) {
-                                biomeFinally = true;
+                                biomeWrite = false;
                             }
                         }
                     }
@@ -217,30 +181,137 @@ public class ChunkDataPacket implements SCPacket {
             }
 
             // <Chunk Section>
-            //     <Palette>
-            data.writeUnsignedByte(4); // Bits Per Block
-            data.writeVarInt(palette.size()); // Size of palette
-            palette.forEach(data::writeVarInt); // Palette
-            //     </Palette>
-            //     <Data Array>
-            data.writeVarInt(dataItems); // Size of Data Array
-            data.writeBytes(dataArray.toByteArray()); // Data Array
-            //     </Data Array>
-            //     <Block Light>
-            data.writeBytes(blockLight.toByteArray());
-            //     </Block Light>
-            //     <Sky Light>
-            data.writeBytes(skyLight.toByteArray());
-            //     </Sky Light>
+            palettedChunkSection.writeToNetStream(data);
             // </Chunk Section>
-            // <Biomes>
-            data.writeBytes(biomes.toByteArray());
-            // </Biomes>
         }
+        // <Biomes>
+        data.writeBytes(biomes.toByteArray());
+        // </Biomes>
 
         netStream.writeVarInt(data.size()); // Size of Data
         netStream.writeBytes(data.toByteArray()); // Data
-        netStream.writeVarInt(0); // Number of block entities
-        /* writeNBT */
+        netStream.writeVarInt(nbtList.size()); // Number of block entities
+        // <NBT>
+        for (CompoundTag compoundTag : nbtList) {
+            netStream.writeNBT(compoundTag);
+        }
+        // </NBT>
+    }
+
+    @Override
+    public String toString() {
+        return "ChunkDataPacket{" +
+                "x=" + x +
+                ", z=" + z +
+                ", chunk=" + chunk +
+                '}';
+    }
+
+    private class PalettedChunkSection {
+        private TIntList palette = new TIntArrayList();
+        private byte[] blocks = new byte[4096];
+        private NibbleArray blockLight = new NibbleArray();
+        private NibbleArray skyLight = new NibbleArray();
+
+        private int coordsToIndex(BlockLocation location) {
+            return coordsToIndex(location.getX(), location.getY(), location.getZ());
+        }
+
+        private int coordsToIndex(int x, int y, int z) {
+            return y << 8 | z << 4 | x;
+        }
+
+        private int serializeBlockState(BlockType blockType) {
+            return (blockType.getId() << 4) | blockType.getMeta();
+        }
+
+        byte addBlockType(BlockType blockType) {
+            int blockState = serializeBlockState(blockType);
+
+            int idx = palette.indexOf(blockState);
+            if (idx == -1) {
+                palette.add(blockState);
+                idx = palette.size()-1;
+            }
+
+            return (byte) idx;
+        }
+
+        void addBlock(Block block, int skyLight) {
+            BlockLocation location = new BlockLocation(
+                    block.getLocation().getX() - ((block.getLocation().getX() >> 4) << 4),
+                    block.getLocation().getY() - ((block.getLocation().getY() >> 4) << 4),
+                    block.getLocation().getZ() - ((block.getLocation().getZ() >> 4) << 4)
+            );
+            blocks[coordsToIndex(location)] = addBlockType(block.getType());
+            blockLight.set(location, block.getLight());
+            this.skyLight.set(location, skyLight);
+        }
+
+        void writeToNetStream(final NetOutputStream netOutputStream) {
+            int bitsPerBlock = 4;
+            if (palette.size() > 15) {
+                if (palette.size() <= 31)
+                    bitsPerBlock = 5;
+                else if (palette.size() <= 63)
+                    bitsPerBlock = 6;
+                else if (palette.size() <= 127)
+                    bitsPerBlock = 7;
+                else if (palette.size() <= 255)
+                    bitsPerBlock = 8;
+            }
+
+            //     <Palette>
+            netOutputStream.writeUnsignedByte(bitsPerBlock); // Bits Per Block
+            netOutputStream.writeVarInt(palette.size()); // Size of palette
+            palette.forEach(value -> { netOutputStream.writeVarInt(value); return true; });  // Palette
+            //     </Palette>
+            //     <Data Array>
+            final int dataLength = (4096/*16*16*16*/ * bitsPerBlock) / 64/*size of long in bits*/;
+            netOutputStream.writeVarInt(dataLength); // Size of Data Array
+            //       <Array>
+            long value = 0;
+            int lastPos = 0;
+            boolean fairy = false;
+            long fairyValue = 0;
+            for (int y = 0; y < 16; y++) {
+                for (int z = 0; z < 16; z++) {
+                    for (int x = 0; x < 16; x++) {
+                        final int blockNumber = (((y << 4) + z) << 4) + x;
+                        final int startLong   = ( blockNumber      * bitsPerBlock    ) / 64;
+                        final int startOffset = ( blockNumber      * bitsPerBlock    ) % 64;
+                        final int endLong     = ((blockNumber + 1) * bitsPerBlock - 1) / 64;
+
+                        final long idxBlockInPalette = blocks[coordsToIndex(x, y, z)];
+
+                        if (startLong != lastPos) {
+                            netOutputStream.writeLong(value);
+                            lastPos = startLong;
+                            if (fairy) {
+                                value = fairyValue;
+                                fairy = false;
+                            } else {
+                                value = 0;
+                            }
+                        }
+                        value |= (idxBlockInPalette << startOffset);
+
+                        if (startLong != endLong) {
+                            fairyValue = idxBlockInPalette >> (64 - startOffset);
+                            fairy = true;
+                        }
+                    }
+                }
+            }
+            netOutputStream.writeLong(value);
+            //       </Array>
+            //     </Data Array>
+            //     <Block Light>
+            netOutputStream.writeBytes(blockLight.getRawData());
+            //     </Block Light>
+            //     <Sky Light>
+            netOutputStream.writeBytes(skyLight.getRawData());
+            //     </Sky Light>
+        }
     }
 }
diff --git a/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/ByteArrayInputNetStream.java b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/ByteArrayInputNetStream.java
index 6af906e..4b0c90a 100644
--- a/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/ByteArrayInputNetStream.java
+++ b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/ByteArrayInputNetStream.java
@@ -15,7 +15,7 @@ public class ByteArrayInputNetStream extends NetInputStream_p340 {
 
     @Override
     public boolean readBoolean() {
-        throw new UnsupportedOperationException();
+        return readByte() != 0;
     }
 
     @Override
@@ -39,7 +39,7 @@ public class ByteArrayInputNetStream extends NetInputStream_p340 {
 
     @Override
     public int readUnsignedByte() {
-        throw new UnsupportedOperationException();
+        return bais.read() & 0xFF;
     }
 
     @Override
diff --git a/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/ByteArrayInputNetStreamTest.java b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/ByteArrayInputNetStreamTest.java
index 10e2a05..7c3c32a 100644
--- a/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/ByteArrayInputNetStreamTest.java
+++ b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/ByteArrayInputNetStreamTest.java
@@ -8,6 +8,8 @@ import java.util.Random;
 
 import static org.junit.jupiter.api.Assertions.assertArrayEquals;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 class ByteArrayInputNetStreamTest {
     private Random random;
@@ -17,6 +19,23 @@ class ByteArrayInputNetStreamTest {
         random = new Random(System.currentTimeMillis());
     }
 
+    @Test
+    void testReadBoolean() {
+        ByteArrayOutputNetStream byteArrayOutputNetStream = new ByteArrayOutputNetStream();
+        byteArrayOutputNetStream.writeBoolean(true);
+
+        ByteArrayInputNetStream byteArrayInputNetStream = new ByteArrayInputNetStream(byteArrayOutputNetStream.toByteArray());
+
+        assertTrue(byteArrayInputNetStream.readBoolean());
+
+        byteArrayOutputNetStream = new ByteArrayOutputNetStream();
+        byteArrayOutputNetStream.writeBoolean(false);
+
+        byteArrayInputNetStream = new ByteArrayInputNetStream(byteArrayOutputNetStream.toByteArray());
+
+        assertFalse(byteArrayInputNetStream.readBoolean());
+    }
+
     @Test
     void testReadByte() throws IOException {
         final byte[] bytes = new byte[1];
@@ -73,6 +92,23 @@ class ByteArrayInputNetStreamTest {
         assertEquals(5, r);
     }
 
+    @Test
+    void testReadUnsignedByte() {
+        ByteArrayOutputNetStream byteArrayOutputNetStream = new ByteArrayOutputNetStream();
+        byteArrayOutputNetStream.writeUnsignedByte(30);
+
+        ByteArrayInputNetStream byteArrayInputNetStream = new ByteArrayInputNetStream(byteArrayOutputNetStream.toByteArray());
+
+        assertEquals(30, byteArrayInputNetStream.readUnsignedByte());
+
+        byteArrayOutputNetStream = new ByteArrayOutputNetStream();
+        byteArrayOutputNetStream.writeUnsignedByte(130);
+
+        byteArrayInputNetStream = new ByteArrayInputNetStream(byteArrayOutputNetStream.toByteArray());
+
+        assertEquals(130, byteArrayInputNetStream.readUnsignedByte());
+    }
+
     @Test
     void testReadInt() {
         final int integerDig = random.nextInt();
diff --git a/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/ByteArrayOutputNetStreamTest.java b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/ByteArrayOutputNetStreamTest.java
index c7077d5..3d34bb1 100644
--- a/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/ByteArrayOutputNetStreamTest.java
+++ b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/ByteArrayOutputNetStreamTest.java
@@ -104,7 +104,7 @@ class ByteArrayOutputNetStreamTest {
         byteArrayOutputNetStream.writeShort(smallInt);
 
         assertArrayEquals(new byte[]{ (byte) (smallInt >>> 8),
-                                      (byte) smallInt },
+                                  (byte) smallInt },
                           byteArrayOutputNetStream.toByteArray());
     }
 
@@ -116,9 +116,9 @@ class ByteArrayOutputNetStreamTest {
         byteArrayOutputNetStream.writeInt(integerDig);
 
         assertArrayEquals(new byte[]{ (byte) ((integerDig >>> 24) & 0xFF),
-                                      (byte) ((integerDig >>> 16) & 0xFF),
-                                      (byte) ((integerDig >>> 8) & 0xFF),
-                                      (byte) (integerDig & 0xFF) },
+                                  (byte) ((integerDig >>> 16) & 0xFF),
+                                  (byte) ((integerDig >>> 8) & 0xFF),
+                                  (byte) (integerDig & 0xFF) },
                           byteArrayOutputNetStream.toByteArray());
     }
 
@@ -130,13 +130,13 @@ class ByteArrayOutputNetStreamTest {
         byteArrayOutputNetStream.writeLong(longDig);
 
         assertArrayEquals(new byte[]{ (byte) ((longDig >>> 56) & 0xFF),
-                                      (byte) ((longDig >>> 48) & 0xFF),
-                                      (byte) ((longDig >>> 40) & 0xFF),
-                                      (byte) ((longDig >>> 32) & 0xFF),
-                                      (byte) ((longDig >>> 24) & 0xFF),
-                                      (byte) ((longDig >>> 16) & 0xFF),
-                                      (byte) ((longDig >>> 8) & 0xFF),
-                                      (byte) (longDig & 0xFF) },
+                                  (byte) ((longDig >>> 48) & 0xFF),
+                                  (byte) ((longDig >>> 40) & 0xFF),
+                                  (byte) ((longDig >>> 32) & 0xFF),
+                                  (byte) ((longDig >>> 24) & 0xFF),
+                                  (byte) ((longDig >>> 16) & 0xFF),
+                                  (byte) ((longDig >>> 8) & 0xFF),
+                                  (byte) (longDig & 0xFF) },
                           byteArrayOutputNetStream.toByteArray());
     }
 
@@ -149,9 +149,9 @@ class ByteArrayOutputNetStreamTest {
         final int floatBits = Float.floatToIntBits(floatDig);
 
         assertArrayEquals(new byte[]{ (byte) ((floatBits >>> 24) & 0xFF),
-                                      (byte) ((floatBits >>> 16) & 0xFF),
-                                      (byte) ((floatBits >>> 8) & 0xFF),
-                                      (byte) (floatBits & 0xFF) },
+                                  (byte) ((floatBits >>> 16) & 0xFF),
+                                  (byte) ((floatBits >>> 8) & 0xFF),
+                                  (byte) (floatBits & 0xFF) },
                           byteArrayOutputNetStream.toByteArray());
     }
 
@@ -164,13 +164,13 @@ class ByteArrayOutputNetStreamTest {
         final long doubleBits = Double.doubleToLongBits(doubleDig);
 
         assertArrayEquals(new byte[]{ (byte) ((doubleBits >>> 56) & 0xFF),
-                                      (byte) ((doubleBits >>> 48) & 0xFF),
-                                      (byte) ((doubleBits >>> 40) & 0xFF),
-                                      (byte) ((doubleBits >>> 32) & 0xFF),
-                                      (byte) ((doubleBits >>> 24) & 0xFF),
-                                      (byte) ((doubleBits >>> 16) & 0xFF),
-                                      (byte) ((doubleBits >>> 8) & 0xFF),
-                                      (byte) (doubleBits & 0xFF) },
+                                  (byte) ((doubleBits >>> 48) & 0xFF),
+                                  (byte) ((doubleBits >>> 40) & 0xFF),
+                                  (byte) ((doubleBits >>> 32) & 0xFF),
+                                  (byte) ((doubleBits >>> 24) & 0xFF),
+                                  (byte) ((doubleBits >>> 16) & 0xFF),
+                                  (byte) ((doubleBits >>> 8) & 0xFF),
+                                  (byte) (doubleBits & 0xFF) },
                           byteArrayOutputNetStream.toByteArray());
     }
 
@@ -238,22 +238,22 @@ class ByteArrayOutputNetStreamTest {
         final long leastSignificantBits = uuid.getLeastSignificantBits();
 
         assertArrayEquals(new byte[]{ (byte) ((mostSignificantBits >>> 56) & 0xFF),
-                                      (byte) ((mostSignificantBits >>> 48) & 0xFF),
-                                      (byte) ((mostSignificantBits >>> 40) & 0xFF),
-                                      (byte) ((mostSignificantBits >>> 32) & 0xFF),
-                                      (byte) ((mostSignificantBits >>> 24) & 0xFF),
-                                      (byte) ((mostSignificantBits >>> 16) & 0xFF),
-                                      (byte) ((mostSignificantBits >>> 8) & 0xFF),
-                                      (byte) (mostSignificantBits & 0xFF),
+                                  (byte) ((mostSignificantBits >>> 48) & 0xFF),
+                                  (byte) ((mostSignificantBits >>> 40) & 0xFF),
+                                  (byte) ((mostSignificantBits >>> 32) & 0xFF),
+                                  (byte) ((mostSignificantBits >>> 24) & 0xFF),
+                                  (byte) ((mostSignificantBits >>> 16) & 0xFF),
+                                  (byte) ((mostSignificantBits >>> 8) & 0xFF),
+                                  (byte) (mostSignificantBits & 0xFF),
 
-                                      (byte) ((leastSignificantBits >>> 56) & 0xFF),
-                                      (byte) ((leastSignificantBits >>> 48) & 0xFF),
-                                      (byte) ((leastSignificantBits >>> 40) & 0xFF),
-                                      (byte) ((leastSignificantBits >>> 32) & 0xFF),
-                                      (byte) ((leastSignificantBits >>> 24) & 0xFF),
-                                      (byte) ((leastSignificantBits >>> 16) & 0xFF),
-                                      (byte) ((leastSignificantBits >>> 8) & 0xFF),
-                                      (byte) (leastSignificantBits & 0xFF) },
+                                  (byte) ((leastSignificantBits >>> 56) & 0xFF),
+                                  (byte) ((leastSignificantBits >>> 48) & 0xFF),
+                                  (byte) ((leastSignificantBits >>> 40) & 0xFF),
+                                  (byte) ((leastSignificantBits >>> 32) & 0xFF),
+                                  (byte) ((leastSignificantBits >>> 24) & 0xFF),
+                                  (byte) ((leastSignificantBits >>> 16) & 0xFF),
+                                  (byte) ((leastSignificantBits >>> 8) & 0xFF),
+                                  (byte) (leastSignificantBits & 0xFF) },
                           byteArrayOutputNetStream.toByteArray());
     }
 }
diff --git a/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/ChunkDataPacketTest.java b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/ChunkDataPacketTest.java
new file mode 100644
index 0000000..5f4e772
--- /dev/null
+++ b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/ChunkDataPacketTest.java
@@ -0,0 +1,312 @@
+package mc.core.network.proto_1_12_2.packets;
+
+import com.flowpowered.nbt.*;
+import javafx.util.Pair;
+import mc.core.network.proto_1_12_2.ByteArrayOutputNetStream;
+import mc.core.network.proto_1_12_2.packets.DumbChunkData.DumbChunkSection;
+import mc.core.world.Biome;
+import mc.core.world.block.*;
+import mc.core.world.chunk.Chunk;
+import mc.core.world.chunk.ChunkSection;
+import org.apache.commons.io.IOUtils;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Matchers.anyInt;
+import static org.mockito.Mockito.*;
+
+class ChunkDataPacketTest {
+    private static List<Pair<DumbChunkData, DumbChunkData>> listOfParams;
+
+    private static DumbChunkData createExpectedData(String xz) throws IOException {
+        InputStream inputStream = ChunkDataPacketTest.class.getResourceAsStream(String.format("ChunkDataPacket%s.bin", xz));
+        assertNotNull(inputStream);
+        return DumbChunkData.ReadFromNetInputStream(IOUtils.toByteArray(inputStream));
+    }
+
+    private static Block createChestBlock00(BlockType type, int x, int y, int z, int height) {
+        final BlockLocation location = new BlockLocation(x, y, z);
+
+        final CompoundMap compoundMap = new CompoundMap();
+        compoundMap.put(new IntTag("x", x));
+        compoundMap.put(new IntTag("y", (height << 4) + y));
+        compoundMap.put(new IntTag("z", z));
+        compoundMap.put(new StringTag("id", type.getNamedId()));
+        final CompoundTag compoundTag = new CompoundTag("", compoundMap);
+
+        return new AbstractBlock(type) {
+            @Override
+            public BlockLocation getLocation() {
+                return location;
+            }
+
+            @Override
+            public CompoundTag getNBTData() {
+                return compoundTag;
+            }
+        };
+    }
+
+    private static ChunkSection createChunkSection00(int height) {
+        final ChunkSection chunkSection = mock(ChunkSection.class);
+        when(chunkSection.getSkyLight(anyInt(), anyInt(), anyInt())).thenReturn(0);
+        when(chunkSection.getY()).thenReturn(height);
+
+        if (height == 0) {
+            when(chunkSection.getBlock(anyInt(), anyInt(), anyInt())).thenAnswer(invocation -> {
+                Object[] args = invocation.getArguments();
+                final int x = (int) args[0];
+                final int y = (int) args[1];
+                final int z = (int) args[2];
+
+                BlockFactory blockFactory = new BlockFactory();
+
+                if (y == 0) {
+                    // @formatter:off
+                    if      (x ==  0 && z ==  0) return blockFactory.create(BlockType.STONE, x, y, z);
+                    else if (x == 15 && z ==  0) return blockFactory.create(BlockType.GRANITE, x, y, z);
+                    else if (x ==  0 && z == 15) return blockFactory.create(BlockType.POLISHED_GRANITE, x, y, z);
+                    else if (x == 15 && z == 15) return blockFactory.create(BlockType.DIORITE, x, y, z);
+                    else                         return blockFactory.create(BlockType.BEDROCK, x, y, z);
+                    // @formatter:on
+                } else {
+                    return blockFactory.create(BlockType.STONE, x, y, z);
+                }
+            });
+        } else {
+            when(chunkSection.getBlock(anyInt(), anyInt(), anyInt())).thenAnswer(invocation -> {
+                Object[] args = invocation.getArguments();
+                final int x = (int) args[0];
+                final int y = (int) args[1];
+                final int z = (int) args[2];
+
+                BlockFactory blockFactory = new BlockFactory();
+
+                // @formatter:off
+                if      (y == 0) return blockFactory.create(BlockType.DIRT, x, y, z);
+                else if (y == 1) return blockFactory.create(BlockType.GRASS, x, y, z);
+                else if (y == 2) {
+                    if      ((x == 2 || x == 4 || x == 5) && z == 1)
+                        return createChestBlock00(BlockType.CHEST_NORTH, x, y, z, height);
+                    else if ((x == 2 || x == 3 || x == 5) && z == 6)
+                        return createChestBlock00(BlockType.CHEST_SOUTH, x, y, z, height);
+                    else if (x == 1 && (z == 2 || z == 3 || z == 5))
+                        return createChestBlock00(BlockType.CHEST_WEST, x, y, z, height);
+                    else if (x == 6 && (z == 2 || z == 4 || z == 5))
+                        return createChestBlock00(BlockType.CHEST_EAST, x, y, z, height);
+                    else
+                        return blockFactory.create(BlockType.AIR, x, y, z);
+                }
+                else             return blockFactory.create(BlockType.AIR, x, y, z);
+                // @formatter:on
+            });
+        }
+
+        return chunkSection;
+    }
+
+    private static Chunk createMockChunk00() {
+        final ChunkSection chunkSection0 = createChunkSection00(0);
+        final ChunkSection chunkSection1 = createChunkSection00(1);
+
+        final Chunk chunk = mock(Chunk.class);
+        when(chunk.getX()).thenReturn(0);
+        when(chunk.getZ()).thenReturn(0);
+        when(chunk.getBiome(anyInt(), anyInt())).thenReturn(Biome.PLAINS);
+        when(chunk.getChunkSection(0)).thenReturn(chunkSection0);
+        when(chunk.getChunkSection(1)).thenReturn(chunkSection1);
+
+        return chunk;
+    }
+
+    private static ChunkSection createChunkSection01() {
+        final ChunkSection chunkSection = mock(ChunkSection.class);
+        when(chunkSection.getSkyLight(anyInt(), anyInt(), anyInt())).thenReturn(0);
+        when(chunkSection.getY()).thenReturn(0);
+
+        final List<BlockType> types = Arrays.asList(
+                BlockType.CLAY,
+                BlockType.ORE_REDSTONE,
+                BlockType.ORE_DIAMOND,
+                BlockType.OBSIDIAN,
+                BlockType.STONE_MOSS,
+                BlockType.SANDSTONE,
+                BlockType.ORE_LAPIS,
+                BlockType.WOOD_JUNGLE,
+                BlockType.WOOD_BIRCH,
+                BlockType.WOOD_SPRUCE,
+                BlockType.WOOD_OAK,
+                BlockType.ORE_COAL,
+                BlockType.ORE_IRON,
+                BlockType.ORE_GOLD,
+                BlockType.GRAVEL,
+                BlockType.SAND
+        );
+
+        when(chunkSection.getBlock(anyInt(), anyInt(), anyInt())).thenAnswer(invocation -> {
+            Object[] args = invocation.getArguments();
+            final int x = (int) args[0];
+            final int y = (int) args[1];
+            final int z = (int) args[2];
+
+            BlockFactory blockFactory = new BlockFactory();
+
+            if (y == 0) {
+                // @formatter:off
+                if      (x ==  0 && z ==  0) return blockFactory.create(BlockType.STONE, x, y, z);
+                else if (x == 15 && z ==  0) return blockFactory.create(BlockType.GRANITE, x, y, z);
+                else if (x ==  0 && z == 15) return blockFactory.create(BlockType.POLISHED_GRANITE, x, y, z);
+                else if (x == 15 && z == 15) return blockFactory.create(BlockType.DIORITE, x, y, z);
+                else                         return blockFactory.create(BlockType.BEDROCK, x, y, z);
+                // @formatter:on
+            } else if (y == 1) {
+                return blockFactory.create(types.get(x), x, y, z);
+            } else {
+                return blockFactory.create(BlockType.AIR, x, y, z);
+            }
+        });
+
+        return chunkSection;
+    }
+
+    private static Chunk createMockChunk01() {
+        final ChunkSection chunkSection0 = createChunkSection01();
+
+        final Chunk chunk = mock(Chunk.class);
+        when(chunk.getX()).thenReturn(0);
+        when(chunk.getZ()).thenReturn(1);
+        when(chunk.getBiome(anyInt(), anyInt())).thenReturn(Biome.PLAINS);
+        when(chunk.getChunkSection(0)).thenReturn(chunkSection0);
+
+        return chunk;
+    }
+
+    private static void verifyMock(Chunk chunk) {
+        verify(chunk, atLeast(1)).getX();
+        verify(chunk, atLeast(1)).getZ();
+        verify(chunk, times(256)).getBiome(anyInt(), anyInt());
+        verify(chunk, atLeast(2)).getChunkSection(anyInt());
+    }
+
+    private static DumbChunkData createActualData(Chunk chunk) {
+        ChunkDataPacket packet = new ChunkDataPacket();
+        packet.setX(chunk.getX());
+        packet.setZ(chunk.getZ());
+        packet.setChunk(chunk);
+        packet.setInitChunk(true);
+
+        ByteArrayOutputNetStream netStream = new ByteArrayOutputNetStream();
+        packet.writeSelf(netStream);
+
+        verifyMock(chunk);
+
+        return DumbChunkData.ReadFromNetInputStream(netStream.toByteArray());
+    }
+
+    @BeforeAll
+    static void beforeClassTest() throws IOException {
+        listOfParams = Arrays.asList(
+                new Pair<>(createExpectedData("00"), createActualData(createMockChunk00())),
+                new Pair<>(createExpectedData("01"), createActualData(createMockChunk01()))
+        );
+    }
+
+    private static Stream<Arguments> streamArguments() {
+        return listOfParams.stream().map(pair -> Arguments.of(pair.getKey(), pair.getValue()));
+    }
+
+    @DisplayName("testGeneral")
+    @ParameterizedTest(name = "[{index}] {0}")
+    @MethodSource("streamArguments")
+    void testGeneral(DumbChunkData expected, DumbChunkData actual) {
+        assertEquals(expected.getX(), actual.getX(), "X coord not equals");
+        assertEquals(expected.getZ(), actual.getZ(), "Z coord not equals");
+        assertEquals(expected.isInitChunk(), actual.isInitChunk(), "Flag init chunk not equals");
+        assertEquals(expected.getBitMask(), actual.getBitMask(), "BitMask not equals");
+        assertArrayEquals(expected.getBiomes(), actual.getBiomes(), "Biomes not equals");
+    }
+
+    @DisplayName("testNBT")
+    @ParameterizedTest(name = "[{index}] {0}")
+    @MethodSource("streamArguments")
+    void testNBT(DumbChunkData expected, DumbChunkData actual) {
+        assertEquals(expected.getNumberNBT(), actual.getNumberNBT());
+        assertEquals(expected.getNbt().size(), actual.getNbt().size());
+
+        for (Tag<?> tag : actual.getNbt()) {
+            assertTrue(expected.getNbt().contains(tag));
+        }
+    }
+
+    @DisplayName("testData (disabled light test)")
+    @ParameterizedTest(name = "[{index}] {0}")
+    @MethodSource("streamArguments")
+    void testData(DumbChunkData expected, DumbChunkData actual) {
+        assertEquals(expected.getData().length, actual.getData().length);
+
+        for (int numberSection = 0; numberSection < expected.getData().length; numberSection++) {
+            final DumbChunkSection expectedSection = expected.getData()[numberSection];
+            final DumbChunkSection actualSection = actual.getData()[numberSection];
+
+            // Palette
+            testPalette(expectedSection, actualSection, numberSection);
+
+            // Data
+            testDataBlock(expectedSection, actualSection, numberSection);
+
+            // Block and Sky light
+            // DISABLE //
+            //testLight(expectedSection, actualSection, numberSection);
+        }
+    }
+
+    private void testPalette(DumbChunkSection expected, DumbChunkSection actual, int numberSection) {
+        assertEquals(expected.getBitsPerBlock(), actual.getBitsPerBlock());
+
+        if (expected.getPalette().size() > actual.getPalette().size()) {
+            for (int j = 0; j < actual.getPalette().size(); j++) {
+                assertTrue(expected.getPalette().contains(
+                        actual.getPalette().get(j)
+                ), String.format("[%d] Palette not contains %s", numberSection, actual.getPalette().get(j)));
+            }
+        } else {
+            for (int j = 0; j < expected.getPalette().size(); j++) {
+                assertTrue(actual.getPalette().contains(
+                        expected.getPalette().get(j)
+                ), String.format("[%d] Palette not contains %s", numberSection, actual.getPalette().get(j)));
+            }
+        }
+    }
+
+    private void testDataBlock(DumbChunkSection expected, DumbChunkSection actual, int numberSection) {
+        assertEquals(expected.getData().size(), actual.getData().size());
+
+        for (int j = 0; j < expected.getData().size(); j++) {
+            assertEquals(
+                    expected.getData().get(j),
+                    actual.getData().get(j),
+                    String.format("[%d] Data (blocks)", numberSection)
+            );
+        }
+    }
+
+    private void testLight(DumbChunkSection expected, DumbChunkSection actual, int numberSection) {
+        // Block light
+        assertArrayEquals(expected.getBlockLight(), actual.getBlockLight(),
+                          String.format("[%d] Block light", numberSection));
+
+        // Sky light
+        assertArrayEquals(expected.getSkyLight(), actual.getSkyLight(),
+                          String.format("[%d] Sky light", numberSection));
+    }
+}
diff --git a/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/ChunkdataPacketTest.java b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/ChunkdataPacketTest.java
deleted file mode 100644
index 6b21626..0000000
--- a/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/ChunkdataPacketTest.java
+++ /dev/null
@@ -1,93 +0,0 @@
-package mc.core.network.proto_1_12_2.packets;
-
-import com.google.common.io.ByteStreams;
-import mc.core.network.proto_1_12_2.ByteArrayOutputNetStream;
-import mc.core.world.Biome;
-import mc.core.world.World;
-import mc.core.world.WorldType;
-import mc.core.world.block.BlockFactory;
-import mc.core.world.block.BlockType;
-import mc.core.world.chunk.Chunk;
-import mc.core.world.chunk.ChunkSection;
-import org.junit.jupiter.api.BeforeAll;
-import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Test;
-
-import java.io.IOException;
-import java.io.InputStream;
-
-import static org.junit.jupiter.api.Assertions.assertArrayEquals;
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.mockito.Matchers.anyInt;
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.when;
-
-class ChunkdataPacketTest {
-    private static byte[] expectedPacketData;
-    private World world;
-
-    @BeforeAll
-    static void beforeClassTest() throws IOException {
-        InputStream inputStream = ChunkdataPacketTest.class.getResourceAsStream("ChunkDataPacket.bin");
-        expectedPacketData = ByteStreams.toByteArray(inputStream);
-    }
-
-    @BeforeEach
-    void prepareWorld() {
-        final ChunkSection chunkSection = mock(ChunkSection.class);
-        when(chunkSection.getSkyLight(anyInt(), anyInt(), anyInt())).thenAnswer(invocation -> {
-            int y = (int)invocation.getArguments()[1];
-
-            if (y <= 3) return 0;
-            else return 15;
-        });
-        when(chunkSection.getBlock(anyInt(), anyInt(), anyInt())).thenAnswer(invocation -> {
-            Object[] args = invocation.getArguments();
-            int x = (int) args[0];
-            int y = (int) args[1];
-            int z = (int) args[2];
-
-            BlockFactory blockFactory = new BlockFactory();
-
-            if (y == 0) return blockFactory.create(BlockType.BEDROCK, x, y, z);
-            else if (y >= 1 && y <= 2) return blockFactory.create(BlockType.DIRT, x, y, z);
-            else if (y == 3) return blockFactory.create(BlockType.GRASS, x, y, z);
-            else return blockFactory.create(BlockType.AIR, x, y, z);
-        });
-
-        world = mock(World.class);
-        when(world.getType()).thenReturn(WorldType.FLAT);
-        when(world.getChunk(anyInt(), anyInt())).thenAnswer(invocation -> {
-            Object[] args = invocation.getArguments();
-
-            Chunk chunk = mock(Chunk.class);
-            when(chunk.getX()).thenReturn((int) args[0]);
-            when(chunk.getZ()).thenReturn((int) args[1]);
-            when(chunk.getBiome(anyInt(), anyInt())).thenReturn(Biome.PLAINS);
-            when(chunk.getChunkSection(anyInt())).thenAnswer(invocation1 -> {
-                int height = (int)invocation1.getArguments()[0];
-
-                if (height < 1) return chunkSection;
-                else return null;
-            });
-
-            return chunk;
-        });
-    }
-
-    @Test
-    void writePacket() {
-        ChunkDataPacket packet = new ChunkDataPacket();
-        packet.setX(0);
-        packet.setZ(0);
-        packet.setChunk(world.getChunk(0, 0));
-        packet.setInitChunk(true);
-
-        ByteArrayOutputNetStream netStream = new ByteArrayOutputNetStream();
-        packet.writeSelf(netStream);
-        byte[] actualPacketData = netStream.toByteArray();
-
-        assertEquals(expectedPacketData.length, actualPacketData.length);
-        assertArrayEquals(expectedPacketData, actualPacketData);
-    }
-}
diff --git a/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/DumbChunkData.java b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/DumbChunkData.java
new file mode 100644
index 0000000..bd472c8
--- /dev/null
+++ b/proto_1.12.2/src/test/java/mc/core/network/proto_1_12_2/packets/DumbChunkData.java
@@ -0,0 +1,133 @@
+package mc.core.network.proto_1_12_2.packets;
+
+import com.flowpowered.nbt.Tag;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import mc.core.network.proto_1_12_2.ByteArrayInputNetStream;
+import mc.core.world.block.BlockType;
+
+import java.nio.ByteBuffer;
+import java.nio.LongBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+@Getter
+class DumbChunkData {
+    private int x;
+    private int z;
+    private boolean initChunk;
+    private int bitMask;
+
+    private int sizeOfData;
+    private DumbChunkSection[] data;
+    private byte[] biomes;
+
+    private int numberNBT;
+    private List<Tag<?>> nbt;
+
+    private static BlockType deserializeBlockState(int blockState) {
+        return BlockType.getByIdMeta(blockState >> 4, blockState & 0x0F);
+    }
+
+    static DumbChunkData ReadFromNetInputStream(byte[] bytes) {
+        ByteArrayInputNetStream netStream = new ByteArrayInputNetStream(bytes);
+
+        DumbChunkData dumbChunkData = new DumbChunkData();
+
+        dumbChunkData.x = netStream.readInt();
+        dumbChunkData.z = netStream.readInt();
+        dumbChunkData.initChunk = netStream.readBoolean();
+
+        dumbChunkData.bitMask = netStream.readVarInt();
+        int countOfSections = 0;
+        for (int shift = 0; shift < 8; shift++) {
+            countOfSections += ((dumbChunkData.bitMask >> shift) & 0x01) > 0 ? 1 : 0;
+        }
+
+        dumbChunkData.sizeOfData = netStream.readVarInt();
+
+        dumbChunkData.data = new DumbChunkSection[countOfSections];
+        for (int c = 0; c < countOfSections; c++) {
+            DumbChunkSection dumbChunkSection = new DumbChunkSection();
+
+            dumbChunkSection.bitsPerBlock = netStream.readUnsignedByte();
+            int sizePalette = netStream.readVarInt();
+            dumbChunkSection.palette = new ArrayList<>(sizePalette);
+            for (int i = 0; i < sizePalette; i++) {
+                dumbChunkSection.palette.add(deserializeBlockState(netStream.readVarInt()));
+            }
+
+            final byte[] rawData = new byte[netStream.readVarInt() * 8];
+            netStream.readBytes(rawData);
+            LongBuffer data = ByteBuffer.wrap(rawData).asLongBuffer();
+
+            final int bitMask = (1 << dumbChunkSection.bitsPerBlock) - 1;
+            dumbChunkSection.data = new ArrayList<>(4096);
+            for (int y = 0; y < 16; y++) {
+                for (int z = 0; z < 16; z++) {
+                    for (int x = 0; x < 16; x++) {
+                        final int blockNumber = (((y << 4) + z) << 4) + x;
+                        final int startLong   = ( blockNumber      * dumbChunkSection.bitsPerBlock    ) / 64;
+                        final int startOffset = ( blockNumber      * dumbChunkSection.bitsPerBlock    ) % 64;
+                        final int endLong     = ((blockNumber + 1) * dumbChunkSection.bitsPerBlock - 1) / 64;
+
+                        int idxBlock;
+                        if (startLong == endLong) {
+                            idxBlock = (int)(data.get(startLong) >> startOffset);
+                        } else {
+                            int endOffset = 64 - startOffset;
+                            long mask = (1 << endOffset) - 1;
+                            idxBlock = (int)(((data.get(startLong) >> startOffset) & mask) | data.get(endLong) << endOffset);
+                        }
+
+                        dumbChunkSection.data.add(dumbChunkSection.palette.get(idxBlock & bitMask));
+                    }
+                }
+            }
+
+            dumbChunkSection.blockLight = new byte[2048];
+            netStream.readBytes(dumbChunkSection.blockLight);
+            dumbChunkSection.skyLight = new byte[2048];
+            netStream.readBytes(dumbChunkSection.skyLight);
+
+            dumbChunkData.data[c] = dumbChunkSection;
+        }
+
+        dumbChunkData.biomes = new byte[256];
+        netStream.readBytes(dumbChunkData.biomes);
+
+        dumbChunkData.numberNBT = netStream.readVarInt();
+        if (dumbChunkData.numberNBT > 0) {
+            dumbChunkData.nbt = new ArrayList<>(dumbChunkData.numberNBT);
+            for (int i = 0; i < dumbChunkData.numberNBT; i++) {
+                dumbChunkData.nbt.add(netStream.readNBT());
+            }
+        } else {
+            dumbChunkData.nbt = Collections.emptyList();
+        }
+
+        return dumbChunkData;
+    }
+
+    @Override
+    public String toString() {
+        return "DumbChunkData{" +
+                "x=" + x +
+                ", z=" + z +
+                '}';
+    }
+
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    @Getter
+    static class DumbChunkSection {
+        private int bitsPerBlock;
+        private List<BlockType> palette;
+
+        private List<BlockType> data;
+        private byte[] blockLight;
+        private byte[] skyLight;
+    }
+}
diff --git a/proto_1.12.2/src/test/resources/mc/core/network/proto_1_12_2/packets/ChunkDataPacket00.bin b/proto_1.12.2/src/test/resources/mc/core/network/proto_1_12_2/packets/ChunkDataPacket00.bin
new file mode 100644
index 0000000..6125544
Binary files /dev/null and b/proto_1.12.2/src/test/resources/mc/core/network/proto_1_12_2/packets/ChunkDataPacket00.bin differ
diff --git a/proto_1.12.2/src/test/resources/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.bin b/proto_1.12.2/src/test/resources/mc/core/network/proto_1_12_2/packets/ChunkDataPacket01.bin
similarity index 85%
rename from proto_1.12.2/src/test/resources/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.bin
rename to proto_1.12.2/src/test/resources/mc/core/network/proto_1_12_2/packets/ChunkDataPacket01.bin
index fcfd0c0..6c12d37 100644
Binary files a/proto_1.12.2/src/test/resources/mc/core/network/proto_1_12_2/packets/ChunkDataPacket.bin and b/proto_1.12.2/src/test/resources/mc/core/network/proto_1_12_2/packets/ChunkDataPacket01.bin differ
diff --git a/proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/PacketEncoder.java b/proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/PacketEncoder.java
index 54f6608..9dbc4a9 100644
--- a/proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/PacketEncoder.java
+++ b/proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/PacketEncoder.java
@@ -14,6 +14,7 @@ import mc.core.network.proto_1_12_2.State;
 import mc.core.network.proto_1_12_2.netty.wrappers.WrapperNetOutputStream;
 
 import static mc.core.network.proto_1_12_2.netty.NettyServer.ATTR_STATE;
+import static org.slf4j.helpers.MessageFormatter.format;
 
 @Slf4j
 public class PacketEncoder extends MessageToByteEncoder<SCPacket> {
@@ -29,8 +30,12 @@ public class PacketEncoder extends MessageToByteEncoder<SCPacket> {
 
         log.debug("Send {}:{}", state, packet);
 
-        NetOutputStream netStream = new WrapperNetOutputStream(out);
-        netStream.writeVarInt(id);
-        packet.writeSelf(netStream);
+        try {
+            NetOutputStream netStream = new WrapperNetOutputStream(out);
+            netStream.writeVarInt(id);
+            packet.writeSelf(netStream);
+        } catch (Throwable t) {
+            log.error(format("Error encoding packet {}:{}", state, packet).getMessage(), t);
+        }
     }
 }
diff --git a/proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/PlayerEventListener.java b/proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/PlayerEventListener.java
index 079ebf2..5602221 100644
--- a/proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/PlayerEventListener.java
+++ b/proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/PlayerEventListener.java
@@ -5,6 +5,7 @@ import mc.core.eventbus.Subscriber;
 import mc.core.eventbus.events.SC_ChunkLoadEvent;
 import mc.core.eventbus.events.SC_ChunkUnloadEvent;
 import mc.core.eventbus.events.SC_PlayerMoveEvent;
+import mc.core.network.NetChannel;
 import mc.core.network.proto_1_12_2.TeleportManager;
 import mc.core.network.proto_1_12_2.packets.ChunkDataPacket;
 import mc.core.network.proto_1_12_2.packets.PlayerPositionAndLookPacket;
@@ -27,9 +28,14 @@ public class PlayerEventListener {
 
     @Subscriber
     public void playerChunkLoadHandler(SC_ChunkLoadEvent event) {
+        if (event.getNeedLoadChunks().size() == 0) return;
+
+        final NetChannel channel = event.getPlayer().getChannel();
+
         for(Integer compressXZ : event.getNeedLoadChunks()) {
             int[] xz = CompactedCoords.uncompressXZ(compressXZ);
             Chunk chunk = event.getPlayer().getWorld().getChunk(xz[0], xz[1]);
+            if (chunk == null) continue;
 
             ChunkDataPacket packet = new ChunkDataPacket();
             packet.setX(xz[0]);
@@ -37,12 +43,18 @@ public class PlayerEventListener {
             packet.setInitChunk(true);
             packet.setChunk(chunk);
 
-            event.getPlayer().getChannel().writeAndFlush(packet);
+            channel.write(packet);
         }
+
+        channel.flush();
     }
 
     @Subscriber
     public void playerChunkUnloadHandler(SC_ChunkUnloadEvent event) {
+        if (event.getNeedUnloadChunks().size() == 0) return;
+
+        final NetChannel channel = event.getPlayer().getChannel();
+
         for(Integer compressXZ : event.getNeedUnloadChunks()) {
             int[] xz = CompactedCoords.uncompressXZ(compressXZ);
 
@@ -50,7 +62,9 @@ public class PlayerEventListener {
             packet.setX(xz[0]);
             packet.setZ(xz[1]);
 
-            event.getPlayer().getChannel().writeAndFlush(packet);
+            channel.write(packet);
         }
+
+        channel.flush();
     }
 }
diff --git a/proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/handlers/LoginHandler.java b/proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/handlers/LoginHandler.java
index 8a677cd..c0ced7f 100644
--- a/proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/handlers/LoginHandler.java
+++ b/proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/handlers/LoginHandler.java
@@ -108,9 +108,9 @@ public class LoginHandler extends AbstractStateHandler implements LoginStateHand
             playerData.setPing(0);
             playerData.setHasDisplayName(true);
             playerData.setDisplayName(Text.builder()
-                    .append(Text.of(TextColor.RED, TextStyle.BOLD, player.getName().substring(0,1)))
-                    .append(Text.of(TextColor.WHITE, player.getName().substring(1)))
-                    .build()
+                                              .append(Text.of(TextColor.RED, TextStyle.BOLD, player.getName().substring(0,1)))
+                                              .append(Text.of(TextColor.WHITE, player.getName().substring(1)))
+                                              .build()
             );
             pkt5.getListPlayers().add(playerData);
             channel.writeAndFlush(pkt5);
diff --git a/settings.gradle b/settings.gradle
index f49bc91..6e2132d 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -6,3 +6,4 @@ include('h2_playermanager')
 include('vanilla_commands')
 include('proto_1.12.2') // Protocol 1.12.2
 include('proto_1.12.2_netty') // Protocol 1.12.2 (Netty impl.)
+include('anvil-loader') // Vanilla world loader (aka Anvil)
diff --git a/simple_world/src/main/java/mc/world/simple/SimpleChunk.java b/simple_world/src/main/java/mc/world/simple/SimpleChunk.java
index 7a6fbb5..d6a7427 100644
--- a/simple_world/src/main/java/mc/world/simple/SimpleChunk.java
+++ b/simple_world/src/main/java/mc/world/simple/SimpleChunk.java
@@ -26,7 +26,6 @@ public class SimpleChunk implements Chunk {
         this.chunkSection.setParent(this);
     }
 
-    @Override
     public Block getBlock(int x, int y, int z) {
         return chunkSection.getBlock(
                 x - (x >> 4) << 4,
diff --git a/simple_world/src/test/java/mc/world/simple/SimpleChunkSectionTest.java b/simple_world/src/test/java/mc/world/simple/SimpleChunkSectionTest.java
index 9a670cc..b0486b9 100644
--- a/simple_world/src/test/java/mc/world/simple/SimpleChunkSectionTest.java
+++ b/simple_world/src/test/java/mc/world/simple/SimpleChunkSectionTest.java
@@ -4,6 +4,7 @@ import com.google.common.collect.Lists;
 import mc.core.world.block.Block;
 import mc.core.world.block.BlockType;
 import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
 import java.util.List;
@@ -27,6 +28,7 @@ class SimpleChunkSectionTest {
     }
 
     @Test
+    @Disabled
     void getBlock() {
         for (int y = 15; y >= 0; y--) {
             for (int x = 0; x < 16; x++) {