diff --git a/example/Vulkan/two_triangle.cpp b/example/Vulkan/two_triangle.cpp
index 0debfe47..8e84e2a7 100644
--- a/example/Vulkan/two_triangle.cpp
+++ b/example/Vulkan/two_triangle.cpp
@@ -4,6 +4,7 @@
 #include"VulkanAppFramework.h"
 #include<hgl/math/Math.h>
 #include<hgl/filesystem/FileSystem.h>
+#include<hgl/graph/SceneTreeToRenderList.h>
 
 using namespace hgl;
 using namespace hgl::graph;
@@ -85,9 +86,17 @@ private:
         
         render_instance=db->CreateRenderableInstance(render_obj,material_instance,pipeline);
 
-        render_root.Add(render_instance,scale(0.5,0.5));
+        {
+            SceneNode *sn=render_root.CreateSubNode(scale(0.5,0.5));
+            sn->RIList.Add(render_instance);
+        }
+
         render_root.RefreshMatrix();
-        render_root.ExpendToList(&render_list);
+
+        SceneTreeToRenderList st2rl(device);
+
+        st2rl.Expend(&render_list,&render_root,&cam);
+
         return(true);
     }
 
diff --git a/inc/hgl/graph/SceneNode.h b/inc/hgl/graph/SceneNode.h
index baa79380..75d9c13c 100644
--- a/inc/hgl/graph/SceneNode.h
+++ b/inc/hgl/graph/SceneNode.h
@@ -28,20 +28,15 @@ namespace hgl
         public:
 
             ObjectList<SceneNode> SubNode;                                                                              ///<子节点
-
-            RenderableInstance *renderable_instances;                                                                   ///<可渲染实例
+            
+            List<RenderableInstance *> RIList;                                                                          ///<可渲染实例
 
         public:
 
-            SceneNode()
-            {
-                renderable_instances=nullptr;
-            }
-
-            SceneNode(const Matrix4f &mat,RenderableInstance *ri=nullptr)
+            SceneNode()=default;
+            SceneNode(const Matrix4f &mat)
             {
                 SetLocalMatrix(mat);
-                renderable_instances=ri;
             }
 
             virtual ~SceneNode()
@@ -68,15 +63,6 @@ namespace hgl
             void AddSubNode(SceneNode *n){if(n)SubNode.Add(n);}                                                         ///<增加一个子节点
             void ClearSubNode(){SubNode.ClearData();}                                                                   ///<清除子节点
 
-            void Set(RenderableInstance *ri){renderable_instances=ri;}                                                  ///<增加渲染实例
-
-            void Set(const Matrix4f &mat,RenderableInstance *ri)
-            {
-                SetLocalMatrix(mat);
-
-                renderable_instances=ri;
-            }
-
         public: //坐标相关方法
 
             virtual         void        SetBoundingBox      (const AABB &bb){BoundingBox=bb;}                           ///<设置绑定盒
diff --git a/inc/hgl/graph/SceneTreeToRenderList.h b/inc/hgl/graph/SceneTreeToRenderList.h
index c0522cf9..5dbb103f 100644
--- a/inc/hgl/graph/SceneTreeToRenderList.h
+++ b/inc/hgl/graph/SceneTreeToRenderList.h
@@ -22,7 +22,7 @@ namespace hgl
 
         protected:
 
-            GPUDevice *device;
+            GPUDevice *     device;
 
         protected:
 
@@ -43,7 +43,7 @@ namespace hgl
 
             virtual float   CameraLength(SceneNode *,SceneNode *);                                  ///<摄像机距离比较函数
 
-            virtual bool    InFrustum(const SceneNode *,void *);                                    ///<平截头截剪函数
+//            virtual bool    InFrustum(const SceneNode *,void *);                                    ///<平截头截剪函数
 
             virtual bool    Begin();
             virtual bool    Expend(SceneNode *);
diff --git a/src/SceneGraph/RenderList.cpp b/src/SceneGraph/RenderList.cpp
index ec4cf94d..e0825789 100644
--- a/src/SceneGraph/RenderList.cpp
+++ b/src/SceneGraph/RenderList.cpp
@@ -152,14 +152,8 @@ namespace hgl
             last_pipeline=nullptr;
             last_ri=nullptr;
 
-            const int count=scene_node_list.GetCount();
-            SceneNode **node=scene_node_list.GetData();
-
-            for(int i=0;i<count;i++)
-            {
-                Render(*node,(*node)->renderable_instances);
-                ++node;
-            }
+            for(SceneNode *sn:scene_node_list)
+                Render(sn,sn->RIList);
 
             return(true);
         }
diff --git a/src/SceneGraph/SceneTreeToRenderList.cpp b/src/SceneGraph/SceneTreeToRenderList.cpp
index 1f5c60be..d5776342 100644
--- a/src/SceneGraph/SceneTreeToRenderList.cpp
+++ b/src/SceneGraph/SceneTreeToRenderList.cpp
@@ -27,25 +27,25 @@ namespace hgl
                     length_squared(obj_two->GetCenter(),camera_info.pos));
         }
 
-        bool SceneTreeToRenderList::InFrustum(const SceneNode *,void *)
-        {
-            return(true);
-        }
-
-        //bool SceneTreeToRenderList::Begin()
+        //bool SceneTreeToRenderList::InFrustum(const SceneNode *,void *)
         //{
-        //    if(!scene_node_list)
-        //        scene_node_list=new SceneNodeList;
-
-        //    scene_node_list->ClearData();
-
-        //    pipeline_sets.ClearData();
-        //    material_sets.ClearData();
-        //    mat_instance_sets.ClearData();
-
         //    return(true);
         //}
 
+        bool SceneTreeToRenderList::Begin()
+        {
+            if(!scene_node_list)
+                scene_node_list=new SceneNodeList;
+
+            scene_node_list->ClearData();
+
+            pipeline_sets.ClearData();
+            material_sets.ClearData();
+            mat_inst_sets.ClearData();
+
+            return(true);
+        }
+
         /**
         * 理论上讲，我们需要按以下顺序排序
         *
@@ -56,22 +56,22 @@ namespace hgl
         *               for(distance)
         */
 
-        //bool SceneTreeToRenderList::End()
-        //{
-        //}
+        bool SceneTreeToRenderList::End()
+        {
+        }
 
-        //bool SceneTreeToRenderList::Expend(SceneNode *sn)
-        //{
-        //    if(!sn)return(false);
+        bool SceneTreeToRenderList::Expend(SceneNode *sn)
+        {
+            if(!sn)return(false);
 
-        //    if(sn->renderable_instances)
-        //        scene_node_list->Add(sn);
+            if(sn->RIList.GetCount()>0)
+                scene_node_list->Add(sn);
 
-        //    for(SceneNode *sub:sn->SubNode)
-        //        Expend(sub);
+            for(SceneNode *sub:sn->SubNode)
+                Expend(sub);
 
-        //    return(true);
-        //}
+            return(true);
+        }
 
         bool SceneTreeToRenderList::Expend(RenderList *rl,const CameraInfo &ci,SceneNode *sn)
         {
@@ -87,6 +87,8 @@ namespace hgl
             Begin();
             Expend(sn);
             End();
+
+            return(true);
         }
     }//namespace graph
 }//namespace hgl