Bruh

src/minecraft/net/minecraft/src/NetClientHandler.java

@@ -592,7 +592,7 @@ public class NetClientHandler extends NetHandler
     	System.arraycopy(packet.getSkyLight()  , 0, storage.getSkylightArray()  .data, 0, storage.getSkylightArray()  .data.length);
     	System.arraycopy(packet.getBlockLight(), 0, storage.getBlocklightArray().data, 0, storage.getBlocklightArray().data.length);
     	storage.setBlockRefCnt(packet.getBlockRefCnt());
-    	this.worldClient.markBlocksDirty(packet.getX().shiftLeft(4), packet.getY() << 4, packet.getZ().shiftLeft(4), (packet.getX().shiftLeft(4)).add(BigInteger.valueOf(15)), packet.getY() + 16, (packet.getZ().shiftLeft(4)).add(BigInteger.valueOf(15)));
+    	this.worldClient.markBlocksDirty(packet.getX().shiftLeft(4), packet.getY() << 4, packet.getZ().shiftLeft(4), (packet.getX().shiftLeft(4)).add(BigInteger.valueOf(16)), packet.getY() << 4 + 16, (packet.getZ().shiftLeft(4)).add(BigInteger.valueOf(16)));
     }
 
     public void handleKickDisconnect(Packet255KickDisconnect par1Packet255KickDisconnect)