diff --git a/CMCore b/CMCore
index a6ca1217..162a6ce2 160000
--- a/CMCore
+++ b/CMCore
@@ -1 +1 @@
-Subproject commit a6ca121707e249368d9fe5b0573ed50ed1684106
+Subproject commit 162a6ce2f2cc5d24a177acf9b3c2ce9a0055e1f5
diff --git a/example/Vulkan/two_triangle.cpp b/example/Vulkan/two_triangle.cpp
index c55d84a4..a009b07c 100644
--- a/example/Vulkan/two_triangle.cpp
+++ b/example/Vulkan/two_triangle.cpp
@@ -32,6 +32,9 @@ private:
 
     Camera cam;
 
+    SceneNode           render_root;
+    RenderList          render_list;
+
     MaterialInstance *  material_instance   =nullptr;
     RenderableInstance *render_instance     =nullptr;
     GPUBuffer *         ubo_world_matrix    =nullptr;
@@ -71,7 +74,7 @@ private:
         material_instance->Update();
         return(true);
     }
-    
+
     bool InitVBO()
     {
         Renderable *render_obj=db->CreateRenderable(VERTEX_COUNT);
@@ -81,6 +84,10 @@ private:
         if(!render_obj->Set(VAN::Color,     db->CreateVAB(VAF_VEC4,VERTEX_COUNT,color_data)))return(false);
         
         render_instance=db->CreateRenderableInstance(render_obj,material_instance,pipeline);
+
+        render_root.Add(render_instance,scale(0.5,0.5));
+        render_root.RefreshMatrix();
+        render_root.ExpendToList(&render_list);
         return(true);
     }
 
@@ -100,8 +107,7 @@ public:
         if(!InitVBO())
             return(false);
 
-        if(!BuildCommandBuffer(render_instance))
-            return(false);
+        BuildCommandBuffer(&render_list);
 
         return(true);
     }
@@ -115,7 +121,7 @@ public:
 
         ubo_world_matrix->Write(&cam.matrix);
 
-        BuildCommandBuffer(render_instance);
+        BuildCommandBuffer(&render_list);
     }
 };//class TestApp:public VulkanApplicationFramework
 
diff --git a/inc/hgl/graph/VKRenderableInstance.h b/inc/hgl/graph/VKRenderableInstance.h
index eb4e6ec0..1b8632c7 100644
--- a/inc/hgl/graph/VKRenderableInstance.h
+++ b/inc/hgl/graph/VKRenderableInstance.h
@@ -11,13 +11,13 @@ VK_NAMESPACE_BEGIN
 */
 class RenderableInstance
 {
-    Pipeline *        pipeline;
-    MaterialInstance *mat_inst;
-    Renderable *      render_obj;
+    Pipeline *          pipeline;
+    MaterialInstance *  mat_inst;
+    Renderable *        render_obj;
 
-    uint32_t buffer_count;
-    VkBuffer *buffer_list;
-    VkDeviceSize *buffer_size;
+    uint32_t            buffer_count;
+    VkBuffer *          buffer_list;
+    VkDeviceSize *      buffer_size;
 
 private:
 
@@ -29,19 +29,19 @@ public:
 
     virtual ~RenderableInstance();
 
-    Pipeline *          GetPipeline         (){return pipeline;}
-    MaterialInstance *  GetMaterialInstance (){return mat_inst;}
-    Renderable *        GetRenderable       (){return render_obj;}
-    const AABB &                GetBoundingBox      ()const{return render_obj->GetBoundingBox();}
+            Pipeline *          GetPipeline         (){return pipeline;}
+            MaterialInstance *  GetMaterialInstance (){return mat_inst;}
+            Renderable *        GetRenderable       (){return render_obj;}
+    const   AABB &              GetBoundingBox      ()const{return render_obj->GetBoundingBox();}
 
-    const   uint32_t        GetBufferCount      ()const{return buffer_count;}
-            VkBuffer *      GetBuffer           ()const{return buffer_list;}
-            VkDeviceSize *  GetBufferSize       ()const{return buffer_size;}
-            IndexBuffer *   GetIndexBuffer      ()const{return render_obj->GetIndexBuffer();}
-    const   uint32_t        GetIndexBufferOffset  ()const{return render_obj->GetIndexBufferOffset();}
-    const   uint32_t        GetDrawCount        ()const{return render_obj->GetDrawCount();}
+    const   uint32_t            GetBufferCount      ()const{return buffer_count;}
+            VkBuffer *          GetBuffer           ()const{return buffer_list;}
+            VkDeviceSize *      GetBufferSize       ()const{return buffer_size;}
+            IndexBuffer *       GetIndexBuffer      ()const{return render_obj->GetIndexBuffer();}
+    const   uint32_t            GetIndexBufferOffset()const{return render_obj->GetIndexBufferOffset();}
+    const   uint32_t            GetDrawCount        ()const{return render_obj->GetDrawCount();}
 
-            DescriptorSets *GetDescriptorSets   ()const{return mat_inst->GetDescriptorSets();}
+            DescriptorSets *    GetDescriptorSets   ()const{return mat_inst->GetDescriptorSets();}
 
 public:
 
diff --git a/src/SceneGraph/RenderList.cpp b/src/SceneGraph/RenderList.cpp
index effcb760..67587e31 100644
--- a/src/SceneGraph/RenderList.cpp
+++ b/src/SceneGraph/RenderList.cpp
@@ -57,6 +57,11 @@ namespace hgl
 
         void RenderList::End()
         {
+            const uint32_t count=scene_node_list.GetCount();
+
+            for(SceneNode *node:scene_node_list)
+            {
+            }
         }
 
         void RenderList::Render(SceneNode *node,RenderableInstance *ri)
@@ -126,6 +131,8 @@ namespace hgl
 
             for(int i=0;i<count;i++)
             {
+//                cmb_buf->....offset L2W Matrix
+
                 Render(*node,(*node)->renderable_instances);
                 ++node;
             }