diff --git a/example/Vulkan/Geometry2D.cpp b/example/Vulkan/Geometry2D.cpp
index 34472d4a..75eb1599 100644
--- a/example/Vulkan/Geometry2D.cpp
+++ b/example/Vulkan/Geometry2D.cpp
@@ -25,18 +25,18 @@ class TestApp:public VulkanApplicationFramework
 
 private:
 
-            SceneNode           render_root;
-            RenderList          render_list;
+    SceneNode           render_root;
+    RenderList          render_list;
 
     Material *          material            =nullptr;
     MaterialInstance *  material_instance   =nullptr;
 
-    Renderable          *ro_rectangle       =nullptr,
-                                *ro_circle          =nullptr,
-                                *ro_round_rectangle =nullptr;
+    Renderable *        ro_rectangle        =nullptr;
+    Renderable *        ro_circle           =nullptr;
+    Renderable *        ro_round_rectangle  =nullptr;
 
-    GPUBuffer *            ubo_world_matrix    =nullptr;
-    GPUBuffer *            ubo_color_material  =nullptr;
+    GPUBuffer *         ubo_world_matrix    =nullptr;
+    GPUBuffer *         ubo_color_material  =nullptr;
 
     Pipeline *          pipeline            =nullptr;
 
diff --git a/example/Vulkan/InlineGeometryScene.cpp b/example/Vulkan/InlineGeometryScene.cpp
index ee4927e5..b8651891 100644
--- a/example/Vulkan/InlineGeometryScene.cpp
+++ b/example/Vulkan/InlineGeometryScene.cpp
@@ -271,8 +271,11 @@ public:
     void BuildCommandBuffer(uint32_t index) override
     {
         render_root.RefreshMatrix();
-        render_list.Clear();
+        render_list.Begin();
         render_root.ExpendToList(&render_list);
+        render_list.End();
+
+
         
         VulkanApplicationFramework::BuildCommandBuffer(index,&render_list);
     }
diff --git a/inc/hgl/graph/RenderList.h b/inc/hgl/graph/RenderList.h
index 50f52f25..6b20bea8 100644
--- a/inc/hgl/graph/RenderList.h
+++ b/inc/hgl/graph/RenderList.h
@@ -57,7 +57,7 @@ namespace hgl
         public:
 
             RenderList();
-            ~RenderList()=default;
+            virtual ~RenderList()=default;
             
             void Begin  ();
             void Add    (SceneNode *);
diff --git a/inc/hgl/graph/VKRenderable.h b/inc/hgl/graph/VKRenderable.h
index 815d7322..4e03f767 100644
--- a/inc/hgl/graph/VKRenderable.h
+++ b/inc/hgl/graph/VKRenderable.h
@@ -83,7 +83,7 @@ public:
     const   int             GetBufferCount()const{return buffer_list.GetCount();}
 
     IndexBuffer *           GetIndexBuffer()            {return indices_buffer;}
-    const VkDeviceSize      GetIndexBufferOffset()const   {return indices_offset;}
+    const VkDeviceSize      GetIndexBufferOffset()const {return indices_offset;}
 };//class Renderable
 VK_NAMESPACE_END
 #endif//HGL_GRAPH_VULKAN_RENDERABLE_INCLUDE
diff --git a/src/SceneGraph/SceneNode.cpp b/src/SceneGraph/SceneNode.cpp
index 700cbda7..e14b61a0 100644
--- a/src/SceneGraph/SceneNode.cpp
+++ b/src/SceneGraph/SceneNode.cpp
@@ -51,7 +51,6 @@ namespace hgl
             }
 
             LocalBoundingBox=local;
-
         }
 
         /**