its was missing a SideOnly

src/main/java/com/cricketcraft/chisel/client/render/SubmapManagerVoidstone.java

@@ -84,6 +84,7 @@ public class SubmapManagerVoidstone extends SubmapManagerBase {
 	}
 
 	@Override
+	@SideOnly(Side.CLIENT)
 	public RenderBlocks createRenderContext(RenderBlocks rendererOld, Block block, IBlockAccess world) {
 		if (rb == null) {
 			rb = new RenderBlocksVoidstone();