diff --git a/CMCore b/CMCore
index 3c382665..ee2bf2b9 160000
--- a/CMCore
+++ b/CMCore
@@ -1 +1 @@
-Subproject commit 3c382665efe376af10b231f603344cfd8a5758e8
+Subproject commit ee2bf2b9b854871b7af3c5e46007fe979119a338
diff --git a/inc/hgl/graph/MaterialRenderList.h b/inc/hgl/graph/MaterialRenderList.h
index e64f3f04..d7f3c4da 100644
--- a/inc/hgl/graph/MaterialRenderList.h
+++ b/inc/hgl/graph/MaterialRenderList.h
@@ -1,6 +1,7 @@
 #pragma once
 #include<hgl/graph/RenderNode.h>
 #include<hgl/graph/VKVABList.h>
+#include<hgl/type/SortedSets.h>
 
 VK_NAMESPACE_BEGIN
 class RenderAssignBuffer;
@@ -37,6 +38,8 @@ private:
         void Set(Renderable *);
     };
 
+    SortedSets<const VDM *> vdm_set;
+
     DataArray<RenderItem> ri_array;
     uint ri_count;
 
@@ -48,7 +51,7 @@ protected:
 
             Pipeline *              last_pipeline;
     const   PrimitiveDataBuffer *   last_data_buffer;
-    const   VertexDataManager *     last_vdm;
+    const   VDM *                   last_vdm;
     const   PrimitiveRenderData *   last_render_data;
 
     bool BindVAB(const PrimitiveDataBuffer *,const uint);
diff --git a/inc/hgl/graph/VK.h b/inc/hgl/graph/VK.h
index f3a26911..ed70f8a0 100644
--- a/inc/hgl/graph/VK.h
+++ b/inc/hgl/graph/VK.h
@@ -104,6 +104,8 @@ class Primitive;
 class Renderable;
 
 class VertexDataManager;
+using VDM=VertexDataManager;
+
 class RenderResource;
 
 enum class SharingMode
diff --git a/inc/hgl/graph/VKIndirectCommandBuffer.h b/inc/hgl/graph/VKIndirectCommandBuffer.h
new file mode 100644
index 00000000..3a44b4ec
--- /dev/null
+++ b/inc/hgl/graph/VKIndirectCommandBuffer.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include<hgl/graph/VKBuffer.h>
+
+VK_NAMESPACE_BEGIN
+
+class IndirectCommandBuffer:public DeviceBuffer
+{
+protected:
+
+    uint32_t max_count;
+    uint32_t stride;
+
+private:
+
+    friend class GPUDevice;
+
+    IndirectCommandBuffer(VkDevice d,const DeviceBufferData &vb,const uint32_t mc,const uint32_t s):DeviceBuffer(d,vb)
+    {
+        max_count=mc;
+        stride=s;
+    }
+
+    ~IndirectCommandBuffer()=default;
+
+    const uint32_t GetMaxCount ()const { return max_count; }
+
+    const VkDeviceSize GetTotalBytes()const { return stride*max_count; }
+    
+    void *  Map     (VkDeviceSize start,VkDeviceSize size)          override {return DeviceBuffer::Map(start*stride,size*stride);}
+    void    Flush   (VkDeviceSize start,VkDeviceSize size)          override {return DeviceBuffer::Flush(start*stride,size*stride);}
+    void    Flush   (VkDeviceSize size)                             override {return DeviceBuffer::Flush(size*stride);}
+
+    bool    Write   (const void *ptr,uint32_t start,uint32_t size)  override {return DeviceBuffer::Write(ptr,start*stride,size*stride);}
+    bool    Write   (const void *ptr,uint32_t size)                 override {return DeviceBuffer::Write(ptr,0,size*stride);}
+};//class IndirectCommandBuffer:public DeviceBuffer
+VK_NAMESPACE_END
diff --git a/inc/hgl/graph/VKRenderable.h b/inc/hgl/graph/VKRenderable.h
index 91549443..cbd5fa47 100644
--- a/inc/hgl/graph/VKRenderable.h
+++ b/inc/hgl/graph/VKRenderable.h
@@ -1,5 +1,4 @@
-#ifndef HGL_GRAPH_RENDERABLE_INCLUDE
-#define HGL_GRAPH_RENDERABLE_INCLUDE
+#pragma once
 
 #include<hgl/graph/VKPrimitive.h>
 #include<hgl/graph/VKPipeline.h>
@@ -69,7 +68,7 @@ public:
 };
 
 /**
-* 可渲染对象<br>
+* 原始可渲染对象(即仅一个模型一个材质)
 */
 class Renderable                                                                ///可渲染对象实例
 {
@@ -111,4 +110,3 @@ public:
 
 Renderable *CreateRenderable(Primitive *,MaterialInstance *,Pipeline *);
 VK_NAMESPACE_END
-#endif//HGL_GRAPH_RENDERABLE_INCLUDE
diff --git a/inc/hgl/graph/VKVertexAttribBuffer.h b/inc/hgl/graph/VKVertexAttribBuffer.h
index 6cec8ec2..9ab4c4bd 100644
--- a/inc/hgl/graph/VKVertexAttribBuffer.h
+++ b/inc/hgl/graph/VKVertexAttribBuffer.h
@@ -32,12 +32,12 @@ namespace hgl
             const uint32_t GetStride()const { return stride; }
             const uint32_t GetCount ()const { return count; }
 
-            const VkDeviceSize GetBytes()const { return stride*count; }
+            const VkDeviceSize GetTotalBytes()const { return stride*count; }
             
         public:
 
             void *  Map     (VkDeviceSize start,VkDeviceSize size)          override {return DeviceBuffer::Map(start*stride,size*stride);}
-            void    Flush   (VkDeviceSize start,VkDeviceSize size)          override {return DeviceBuffer::Flush(start*stride,size*stride); }
+            void    Flush   (VkDeviceSize start,VkDeviceSize size)          override {return DeviceBuffer::Flush(start*stride,size*stride);}
             void    Flush   (VkDeviceSize size)                             override {return DeviceBuffer::Flush(size*stride);}
             
             bool    Write   (const void *ptr,uint32_t start,uint32_t size)  override {return DeviceBuffer::Write(ptr,start*stride,size*stride);}
diff --git a/inc/hgl/graph/VertexDataManager.h b/inc/hgl/graph/VertexDataManager.h
index e2c140a2..3fa335d3 100644
--- a/inc/hgl/graph/VertexDataManager.h
+++ b/inc/hgl/graph/VertexDataManager.h
@@ -57,4 +57,6 @@ public:
     IndexBuffer *GetIBO(){return ibo;}
     VAB *GetVAB(const uint index){return vab[index];}
 };//class VertexDataManager
+
+using VDM=VertexDataManager;
 VK_NAMESPACE_END
diff --git a/src/SceneGraph/CMakeLists.txt b/src/SceneGraph/CMakeLists.txt
index d854fc10..07dbca75 100644
--- a/src/SceneGraph/CMakeLists.txt
+++ b/src/SceneGraph/CMakeLists.txt
@@ -236,6 +236,7 @@ SOURCE_GROUP("Vulkan\\Render Pass" FILES ${VK_RENDER_PASS_SOURCE})
 SOURCE_GROUP("Vulkan\\Render Context" FILES ${VK_RENDER_CONTEXT_SOURCE})
 
 SET(VK_CMD_BUFFER_SOURCE    ${SG_INCLUDE_PATH}/VKCommandBuffer.h
+                            ${SG_INCLUDE_PATH}/VKIndirectCommandBuffer.h
                             Vulkan/VKCommandBuffer.cpp
                             Vulkan/VKCommandBufferRender.cpp)
 
diff --git a/src/SceneGraph/MaterialRenderList.cpp b/src/SceneGraph/MaterialRenderList.cpp
index 4af939d9..06862dae 100644
--- a/src/SceneGraph/MaterialRenderList.cpp
+++ b/src/SceneGraph/MaterialRenderList.cpp
@@ -135,6 +135,9 @@ void MaterialRenderList::Stat()
     last_vdm        =ri->pdb->vdm;
     last_render_data=ri->prd;
 
+    if(last_vdm)
+        vdm_set.Add(last_vdm);
+
     ++rn;
 
     for(uint i=1;i<count;i++)
@@ -174,8 +177,12 @@ void MaterialRenderList::Stat()
         last_vdm        =ri->pdb->vdm;
         last_render_data=ri->prd;
 
+        if(last_vdm)
+            vdm_set.Add(last_vdm);
+
         ++rn;
     }
+
 }
 
 bool MaterialRenderList::BindVAB(const PrimitiveDataBuffer *pdb,const uint ri_index)