there can be more than 3 dimensions

src/main/java/carpet/script/utils/ShapesRenderer.java

@@ -39,16 +39,13 @@ public class ShapesRenderer
     {
         this.client = minecraftClient;
         shapes = new HashMap<>();
-        shapes.put(DimensionType.OVERWORLD, new Long2ObjectOpenHashMap<>());
-        shapes.put(DimensionType.THE_NETHER, new Long2ObjectOpenHashMap<>());
-        shapes.put(DimensionType.THE_END, new Long2ObjectOpenHashMap<>());
     }
 
     public void render(Camera camera, float partialTick)
     {
         IWorld iWorld = this.client.world;
         DimensionType dimensionType = iWorld.getDimension().getType();
-        if (shapes.get(dimensionType).isEmpty()) return;
+        if (shapes.get(dimensionType) == null || shapes.get(dimensionType).isEmpty()) return;
         long currentTime = client.world.getTime();
         RenderSystem.disableTexture();
         RenderSystem.enableDepthTest();
@@ -130,7 +127,7 @@ public class ShapesRenderer
             long key = rshape.key();
             synchronized (shapes)
             {
-                RenderedShape<?> existing = shapes.get(dim).get(key);
+                RenderedShape<?> existing = shapes.computeIfAbsent(dim, d -> new Long2ObjectOpenHashMap<>()).get(key);
                 if (existing != null)
                 {   // promoting previous shape
                     existing.expiryTick = rshape.expiryTick;