diff --git a/FightSystem_12/src/de/steamwar/fightsystem/utils/TechHider_12.java b/FightSystem_12/src/de/steamwar/fightsystem/utils/TechHider_12.java
index 0a5e8c7..537dc90 100644
--- a/FightSystem_12/src/de/steamwar/fightsystem/utils/TechHider_12.java
+++ b/FightSystem_12/src/de/steamwar/fightsystem/utils/TechHider_12.java
@@ -6,19 +6,20 @@ import com.comphenix.protocol.events.PacketAdapter;
 import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.events.PacketEvent;
 import com.comphenix.protocol.reflect.StructureModifier;
+import com.comphenix.protocol.wrappers.nbt.NbtBase;
 import com.comphenix.protocol.wrappers.nbt.NbtCompound;
-import com.comphenix.protocol.wrappers.nbt.NbtFactory;
 import de.steamwar.fightsystem.Config;
 import de.steamwar.fightsystem.IFightSystem;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.UnpooledByteBufAllocator;
 import net.minecraft.server.v1_12_R1.PacketPlayOutMapChunk;
+import org.bukkit.Bukkit;
 import org.bukkit.craftbukkit.v1_12_R1.CraftChunk;
 import org.bukkit.craftbukkit.v1_12_R1.entity.CraftPlayer;
 import org.bukkit.entity.Player;
 
-import java.util.ArrayList;
 import java.util.List;
+import java.util.logging.Level;
 
 import static de.steamwar.fightsystem.utils.ITechHider.bypass;
 
@@ -50,19 +51,18 @@ class TechHider_12 {
 
                 packet = packet.shallowClone();
                 e.setPacket(packet);
-                StructureModifier<List> list = packet.getSpecificModifier(List.class);
-                List nmsTags = list.read(0);
+                StructureModifier<List<NbtBase<?>>> list = packet.getListNbtModifier();
+                List<NbtBase<?>> nmsTags = list.read(0);
                 boolean changed = false;
-                List newNmsTags = new ArrayList(nmsTags.size());
-                for(Object nmsTag : nmsTags){
-                    NbtCompound nbt = NbtFactory.fromNMSCompound(nmsTag);
-                    if(Config.HiddenBlockEntities.contains(nbt.getString("id")))
+                for(int i = nmsTags.size() - 1; i >= 0; i--){
+                    NbtCompound nbt = (NbtCompound)nmsTags.get(i);
+                    if(Config.HiddenBlockEntities.contains(nbt.getString("id"))){
+                        nmsTags.remove(i);
                         changed = true;
-                    else
-                        newNmsTags.add(nmsTag);
+                    }
                 }
                 if(changed)
-                    list.write(0, newNmsTags);
+                    list.write(0, nmsTags);
 
                 changed = false;
                 StructureModifier<byte[]> byteArray = packet.getByteArrays();
@@ -73,48 +73,34 @@ class TechHider_12 {
                 while(i < data.length){
                     byte bitsPerBlock = data[i++];
                     buffer.writeByte(bitsPerBlock);
-                    if(bitsPerBlock < 4)
-                        bitsPerBlock = 4;
-                    else if(bitsPerBlock > 8){
-                        bitsPerBlock = 13;
-                        buffer.writeByte(data[++i]);
-                    }
 
                     if(bitsPerBlock != 13){
                         int paletteLength = ITechHider.readVarInt(data, i);
                         int paletteLengthLength = ITechHider.readVarIntLength(data, i);
                         buffer.writeBytes(data, i, paletteLengthLength);
                         i += paletteLengthLength;
-                        List<Integer> palette = new ArrayList<>(paletteLength);
-                        for(int actPaletteId = 0; actPaletteId < paletteLength; actPaletteId++){
-                            palette.add(ITechHider.readVarInt(data, i));
-                            i += ITechHider.readVarIntLength(data, i);
-                        }
 
-                        int replacement = 0;
-                        for(int entry : palette){
-                            int blockId = entry >> 4;
-                            if(Config.HiddenBlocks.contains(blockId)){
-                                while(palette.contains((++replacement) << 4));
-                                entry = replacement << 4;
+                        for(int actPaletteId = 0; actPaletteId < paletteLength; actPaletteId++){
+                            int entry = ITechHider.readVarInt(data, i);
+                            i += ITechHider.readVarIntLength(data, i);
+
+                            if(Config.HiddenBlocks.contains(entry >> 4)){
+                                entry = obfuscateShift4;
                                 changed = true;
                             }
                             buffer.writeBytes(ITechHider.writeVarInt(entry));
                         }
-
-                        int dataArrayLength = ITechHider.readVarInt(data, i);
-                        int dataArrayLengthLength = ITechHider.readVarIntLength(data, i);
-                        buffer.writeBytes(data, i, dataArrayLength * 8 + dataArrayLengthLength);
-                        i += dataArrayLengthLength;
-                        i += dataArrayLength * 8;
                     }else{
-                        int dataArrayLength = ITechHider.readVarInt(data, i);
-                        int dataArrayLengthLength = ITechHider.readVarIntLength(data, i);
-                        buffer.writeBytes(data, i, dataArrayLength*8 + dataArrayLengthLength);
-                        i += dataArrayLengthLength;
-                        i += dataArrayLength * 8;
+                        buffer.writeByte(data[++i]); //Empty palette
+                        Bukkit.getLogger().log(Level.SEVERE, "Full chunk 1.12 occured");
                     }
 
+                    int dataArrayLength = ITechHider.readVarInt(data, i);
+                    int dataArrayLengthLength = ITechHider.readVarIntLength(data, i);
+                    buffer.writeBytes(data, i, dataArrayLength*8 + dataArrayLengthLength);
+                    i += dataArrayLengthLength;
+                    i += dataArrayLength * 8;
+
                     buffer.writeBytes(data, i, 4096);
                     i += 4096; //Skylight (Not in Nether/End!!!) 2048 + Blocklight 2048
                 }
diff --git a/FightSystem_API/src/de/steamwar/fightsystem/Config.java b/FightSystem_API/src/de/steamwar/fightsystem/Config.java
index 88bb7dc..ff058e8 100644
--- a/FightSystem_API/src/de/steamwar/fightsystem/Config.java
+++ b/FightSystem_API/src/de/steamwar/fightsystem/Config.java
@@ -103,6 +103,7 @@ public class Config {
     public static final List<String> ForbiddenItems;
 
     //tech hider parameter
+    public static final boolean TechhiderActive;
     public static final Set<Integer> HiddenBlocks;
     public static final Set<String> HiddenBlockTags;
     public static final Set<String> HiddenBlockEntities;
@@ -208,6 +209,7 @@ public class Config {
         HiddenBlockEntities = Collections.unmodifiableSet(new HashSet<>(config.getStringList("Techhider.HiddenBlockEntities")));
         ObfuscateWith = config.getInt("Techhider.ObfuscateWith");
         ObfuscateWithTag = config.getString("Techhider.ObfuscateWithTag");
+        TechhiderActive = config.getBoolean("Techhider.Active");
 
         if(schemsizeX < 0){
             SchemsizeX = -schemsizeX;
diff --git a/FightSystem_Main/src/de/steamwar/fightsystem/utils/TechHider.java b/FightSystem_Main/src/de/steamwar/fightsystem/utils/TechHider.java
index 00a2a71..fa2f14f 100644
--- a/FightSystem_Main/src/de/steamwar/fightsystem/utils/TechHider.java
+++ b/FightSystem_Main/src/de/steamwar/fightsystem/utils/TechHider.java
@@ -236,6 +236,6 @@ public class TechHider {
     }
 
     private static boolean disabled(){
-        return Config.OnlyPublicSchematics || Config.test();
+        return Config.OnlyPublicSchematics || Config.test() || !Config.TechhiderActive;
     }
 }