SpigotCore_14/src/de/steamwar/techhider/ChunkHider14.java

@@ -27,7 +27,7 @@ import java.util.Set;
 public class ChunkHider14 extends ChunkHider9 {
 
     @Override
-    protected void dataHider(PosEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, ByteBuf in, ByteBuf out, boolean skip) {
+    protected void dataHider(PosEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, ByteBuf in, ByteBuf out, boolean skip, boolean blockPrecise) {
         out.writeShort(in.readShort()); // Block count
         byte bitsPerBlock = in.readByte();
         out.writeByte(bitsPerBlock);
@@ -37,6 +37,6 @@ public class ChunkHider14 extends ChunkHider9 {
             obfuscate = Collections.emptySet();
         }
 
-        processDataArray(locationEvaluator, obfuscationTarget, obfuscate, in, out, bitsPerBlock, skip);
+        processDataArray(locationEvaluator, obfuscationTarget, obfuscate, in, out, bitsPerBlock, skip || (!blockPrecise && bitsPerBlock < 9));
     }
 }

SpigotCore_18/src/de/steamwar/techhider/ChunkHider18.java

@@ -73,7 +73,8 @@ public class ChunkHider18 implements ChunkHider {
             int zOffset = 16*chunkZ;
             for(int yOffset = p.getWorld().getMinHeight(); yOffset < p.getWorld().getMaxHeight(); yOffset += 16) {
                 int finalYOffset = yOffset;
-                dataHider((x, y, z) -> locationEvaluator.check(p, x+xOffset, y+finalYOffset, z+zOffset), obfuscationTarget, obfuscate, in, out, locationEvaluator.skipChunkSection(p, chunkX, yOffset/16, chunkZ));
+                int chunkY = yOffset/16;
+                dataHider((x, y, z) -> locationEvaluator.check(p, x+xOffset, y+finalYOffset, z+zOffset), obfuscationTarget, obfuscate, in, out, locationEvaluator.skipChunkSection(p, chunkX, chunkY, chunkZ), locationEvaluator.blockPrecise(p, chunkX, chunkY, chunkZ));
             }
             out.writeBytes(in); // MC appends a 0 byte at the end if there is a full chunk, idk why
 
@@ -95,7 +96,7 @@ public class ChunkHider18 implements ChunkHider {
         return !hiddenBlockEntities.contains((String) getName.invoke(getKey.invoke(tileEntityTypes, entityType.get(tile))));
     }
 
-    private void dataHider(PosEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, ByteBuf in, ByteBuf out, boolean skip) {
+    private void dataHider(PosEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, ByteBuf in, ByteBuf out, boolean skip, boolean blockPrecise) {
         out.writeShort(in.readShort()); // Block count
 
         containerWalker(in, out, 15, obfuscationTarget, skip ? Collections.emptySet() : obfuscate, (paletteTarget, dataArrayLength, bitsPerBlock) -> {
@@ -107,7 +108,7 @@ public class ChunkHider18 implements ChunkHider {
                 palettedObfuscate = obfuscate;
             }
 
-            if(skip || dataArrayLength == 0) {
+            if(skip || dataArrayLength == 0 || (!blockPrecise && bitsPerBlock < 15)) {
                 out.writeBytes(in, dataArrayLength*8);
                 return;
             }

SpigotCore_9/src/de/steamwar/techhider/ChunkHider9.java

@@ -67,7 +67,7 @@ public class ChunkHider9 extends ChunkHider8 {
                     continue;
 
                 int yOffset = 16*chunkY;
-                dataHider((x, y, z) -> locationEvaluator.check(p, x+xOffset, y+yOffset, z+zOffset), obfuscationTarget, obfuscate, in, out, locationEvaluator.skipChunkSection(p, chunkX, chunkY, chunkZ));
+                dataHider((x, y, z) -> locationEvaluator.check(p, x+xOffset, y+yOffset, z+zOffset), obfuscationTarget, obfuscate, in, out, locationEvaluator.skipChunkSection(p, chunkX, chunkY, chunkZ), locationEvaluator.blockPrecise(p, chunkX, chunkY, chunkZ));
             }
             byte[] data = new byte[out.readableBytes()];
             out.readBytes(data);
@@ -77,7 +77,7 @@ public class ChunkHider9 extends ChunkHider8 {
         };
     }
 
-    protected void dataHider(PosEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, ByteBuf in, ByteBuf out, boolean skip) {
+    protected void dataHider(PosEvaluator locationEvaluator, int obfuscationTarget, Set<Integer> obfuscate, ByteBuf in, ByteBuf out, boolean skip, boolean blockPrecise) {
         byte bitsPerBlock = in.readByte();
         out.writeByte(bitsPerBlock);
 
@@ -87,7 +87,7 @@ public class ChunkHider9 extends ChunkHider8 {
             obfuscate = Collections.emptySet();
         }
 
-        processDataArray(locationEvaluator, obfuscationTarget, obfuscate, in, out, bitsPerBlock, skip);
+        processDataArray(locationEvaluator, obfuscationTarget, obfuscate, in, out, bitsPerBlock, skip || (!blockPrecise && bitsPerBlock < 9));
 
         out.writeBytes(in, 4096); //Skylight (Not in Nether/End!!!) 2048 + Blocklight 2048
     }

SpigotCore_Main/src/de/steamwar/techhider/TechHider.java

@@ -160,5 +160,9 @@ public class TechHider {
         default State checkBlockPos(Player player, Object pos) {
             return check(player, blockPositionX.get(pos), blockPositionY.get(pos), blockPositionZ.get(pos));
         }
+
+        default boolean blockPrecise(Player player, int x, int y, int z) {
+            return false;
+        }
     }
 }