diff --git a/src/main/java/team/chisel/client/render/SubmapManagerAntiblock.java b/src/main/java/team/chisel/client/render/SubmapManagerAntiblock.java
index 0a078081..13e52042 100644
--- a/src/main/java/team/chisel/client/render/SubmapManagerAntiblock.java
+++ b/src/main/java/team/chisel/client/render/SubmapManagerAntiblock.java
@@ -75,7 +75,13 @@ public class SubmapManagerAntiblock extends SubmapManagerBase {
     };
 
     @SideOnly(Side.CLIENT)
-    private RenderBlocksCTMFullbright rb;
+    private static ThreadLocal<RenderBlocksCTMFullbright> renderBlocksThreadLocal;
+
+    private static void initStatics() {
+        if (renderBlocksThreadLocal == null) {
+            renderBlocksThreadLocal = ThreadLocal.withInitial(RenderBlocksCTMFullbright::new);
+        }
+    }
 
     private String color;
     private TextureSubmap submap, submapSmall;
@@ -99,9 +105,8 @@ public class SubmapManagerAntiblock extends SubmapManagerBase {
     @Override
     @SideOnly(Side.CLIENT)
     public RenderBlocks createRenderContext(RenderBlocks rendererOld, Block block, IBlockAccess world) {
-        if (rb == null) {
-            rb = new RenderBlocksCTMFullbright();
-        }
+        initStatics();
+        RenderBlocksCTMFullbright rb = renderBlocksThreadLocal.get();
         rb.setRenderBoundsFromBlock(block);
         rb.submap = submap;
         rb.submapSmall = submapSmall;
diff --git a/src/main/java/team/chisel/client/render/SubmapManagerCarpetFloor.java b/src/main/java/team/chisel/client/render/SubmapManagerCarpetFloor.java
index 69e39131..cd4bd290 100644
--- a/src/main/java/team/chisel/client/render/SubmapManagerCarpetFloor.java
+++ b/src/main/java/team/chisel/client/render/SubmapManagerCarpetFloor.java
@@ -14,7 +14,13 @@ import team.chisel.ctmlib.TextureSubmap;
 public class SubmapManagerCarpetFloor extends SubmapManagerBase {
 
     @SideOnly(Side.CLIENT)
-    private RenderBlocksCTM rb;
+    private static ThreadLocal<RenderBlocksCTM> renderBlocksThreadLocal;
+
+    private static void initStatics() {
+        if (renderBlocksThreadLocal == null) {
+            renderBlocksThreadLocal = ThreadLocal.withInitial(RenderBlocksCTM::new);
+        }
+    }
 
     private TextureSubmap submap;
     private TextureSubmap submapSmall;
@@ -45,9 +51,8 @@ public class SubmapManagerCarpetFloor extends SubmapManagerBase {
     @Override
     @SideOnly(Side.CLIENT)
     public RenderBlocks createRenderContext(RenderBlocks rendererOld, Block block, IBlockAccess world) {
-        if (rb == null) {
-            rb = new RenderBlocksCTM();
-        }
+        initStatics();
+        RenderBlocksCTM rb = renderBlocksThreadLocal.get();
         rb.setRenderBoundsFromBlock(block);
         rb.submap = submap;
         rb.submapSmall = submapSmall;
diff --git a/src/main/java/team/chisel/client/render/SubmapManagerCombinedCTM.java b/src/main/java/team/chisel/client/render/SubmapManagerCombinedCTM.java
index 88860c89..820b093e 100644
--- a/src/main/java/team/chisel/client/render/SubmapManagerCombinedCTM.java
+++ b/src/main/java/team/chisel/client/render/SubmapManagerCombinedCTM.java
@@ -99,7 +99,13 @@ public class SubmapManagerCombinedCTM extends SubmapManagerBase {
     }
 
     @SideOnly(Side.CLIENT)
-    private RenderBlocksCTM rb;
+    private static ThreadLocal<RenderBlocksCombinedCTM> renderBlocksThreadLocal;
+
+    private static void initStatics() {
+        if (renderBlocksThreadLocal == null) {
+            renderBlocksThreadLocal = new ThreadLocal<>();
+        }
+    }
 
     private TextureSubmap submap, smallSubmap;
     private int size;
@@ -133,8 +139,11 @@ public class SubmapManagerCombinedCTM extends SubmapManagerBase {
     @Override
     @SideOnly(Side.CLIENT)
     public RenderBlocks createRenderContext(RenderBlocks rendererOld, Block block, IBlockAccess world) {
+        initStatics();
+        RenderBlocksCombinedCTM rb = renderBlocksThreadLocal.get();
         if (rb == null) {
             rb = new RenderBlocksCombinedCTM();
+            renderBlocksThreadLocal.set(rb);
         }
         rb.setRenderBoundsFromBlock(block);
         return rb;
diff --git a/src/main/java/team/chisel/client/render/SubmapManagerSlab.java b/src/main/java/team/chisel/client/render/SubmapManagerSlab.java
index 339987e0..9b7b2fcc 100644
--- a/src/main/java/team/chisel/client/render/SubmapManagerSlab.java
+++ b/src/main/java/team/chisel/client/render/SubmapManagerSlab.java
@@ -16,7 +16,13 @@ import team.chisel.ctmlib.TextureSubmap;
 public class SubmapManagerSlab implements ISubmapManager {
 
     @SideOnly(Side.CLIENT)
-    private RenderBlocksCTM rb;
+    private static ThreadLocal<RenderBlocksCTM> renderBlocksThreadLocal;
+
+    private static void initStatics() {
+        if (renderBlocksThreadLocal == null) {
+            renderBlocksThreadLocal = ThreadLocal.withInitial(RenderBlocksCTM::new);
+        }
+    }
 
     private TextureSubmap submap;
     private TextureSubmap submapSmall;
@@ -49,9 +55,8 @@ public class SubmapManagerSlab implements ISubmapManager {
     @Override
     @SideOnly(Side.CLIENT)
     public RenderBlocks createRenderContext(RenderBlocks rendererOld, Block block, IBlockAccess world) {
-        if (rb == null) {
-            rb = new RenderBlocksCTM();
-        }
+        initStatics();
+        RenderBlocksCTM rb = renderBlocksThreadLocal.get();
         rb.setRenderBoundsFromBlock(block);
         rb.submap = submap;
         rb.submapSmall = submapSmall;
diff --git a/src/main/java/team/chisel/client/render/SubmapManagerSpecialMaterial.java b/src/main/java/team/chisel/client/render/SubmapManagerSpecialMaterial.java
index 2e5719d4..4466dc1e 100644
--- a/src/main/java/team/chisel/client/render/SubmapManagerSpecialMaterial.java
+++ b/src/main/java/team/chisel/client/render/SubmapManagerSpecialMaterial.java
@@ -48,7 +48,14 @@ public class SubmapManagerSpecialMaterial extends SubmapManagerBase {
         }
     };
 
-    private RenderBlocksCTMFullbright renderBlocksFullbright;
+    @SideOnly(Side.CLIENT)
+    private static ThreadLocal<RenderBlocksCTMFullbright> renderBlocksThreadLocal;
+
+    private static void initStatics() {
+        if (renderBlocksThreadLocal == null) {
+            renderBlocksThreadLocal = ThreadLocal.withInitial(RenderBlocksCTMFullbright::new);
+        }
+    }
 
     private String color;
     private MaterialType materialType;
@@ -76,9 +83,8 @@ public class SubmapManagerSpecialMaterial extends SubmapManagerBase {
     @Override
     @SideOnly(Side.CLIENT)
     public RenderBlocks createRenderContext(RenderBlocks rendererOld, Block block, IBlockAccess world) {
-        if (renderBlocksFullbright == null) {
-            renderBlocksFullbright = new RenderBlocksCTMFullbright();
-        }
+        initStatics();
+        RenderBlocksCTMFullbright renderBlocksFullbright = renderBlocksThreadLocal.get();
         renderBlocksFullbright.setRenderBoundsFromBlock(block);
         renderBlocksFullbright.submap = submap;
         renderBlocksFullbright.submapSmall = submapSmall;
diff --git a/src/main/java/team/chisel/client/render/SubmapManagerVoidstone.java b/src/main/java/team/chisel/client/render/SubmapManagerVoidstone.java
index dc6d493e..84669a3e 100644
--- a/src/main/java/team/chisel/client/render/SubmapManagerVoidstone.java
+++ b/src/main/java/team/chisel/client/render/SubmapManagerVoidstone.java
@@ -79,7 +79,13 @@ public class SubmapManagerVoidstone extends SubmapManagerBase {
     }
 
     @SideOnly(Side.CLIENT)
-    private RenderBlocksVoidstone rb;
+    private static ThreadLocal<RenderBlocksVoidstone> renderBlocksThreadLocal;
+
+    private static void initStatics() {
+        if (renderBlocksThreadLocal == null) {
+            renderBlocksThreadLocal = new ThreadLocal<>();
+        }
+    }
 
     private ISubmapManager overlay;
     private TextureSubmap base;
@@ -123,8 +129,11 @@ public class SubmapManagerVoidstone extends SubmapManagerBase {
     @Override
     @SideOnly(Side.CLIENT)
     public RenderBlocks createRenderContext(RenderBlocks rendererOld, Block block, IBlockAccess world) {
+        initStatics();
+        RenderBlocksVoidstone rb = renderBlocksThreadLocal.get();
         if (rb == null) {
             rb = new RenderBlocksVoidstone();
+            renderBlocksThreadLocal.set(rb);
         }
         RenderBlocks ctx = overlay.createRenderContext(rendererOld, block, world);
         rb.setRenderBoundsFromBlock(block);