private TreeNode CreateBVHNode(BVH <Primitive> bvhNode)
        {
            TreeNode node = Nodifier.CreateBVHNode(bvhNode);

            if (!bvhNode.IsLeaf)
            {
                node.Nodes.Add(new TreeNode("...")
                {
                    Tag = BVHPlaceholder
                });
            }

            return(node);
        }
        public void UpdateBVH()
        {
            treeBVH.BeginUpdate();
            treeBVH.Nodes.Clear();

            if (_Scene.Accelerator != null)
            {
                TreeNode root = Nodifier.CreateBVHNode(_Scene.Accelerator, "Root");
                ExpandBVHNode(root, true);
                root.Expand();

                treeBVH.Nodes.Add(root);
                treeBVH.SelectedNode = root;
            }

            treeBVH.EndUpdate();
        }