diff --git a/example/Vulkan/Deferred.cpp b/example/Vulkan/Deferred.cpp
index b72deeb2..6a7eb0ad 100644
--- a/example/Vulkan/Deferred.cpp
+++ b/example/Vulkan/Deferred.cpp
@@ -46,6 +46,11 @@ private:
 
     struct DeferredGBuffer
     {
+        vulkan::Semaphore *present_complete_semaphore  =nullptr,
+                          *render_complete_semaphore   =nullptr;
+
+        vulkan::RenderTarget *rt;
+
         VkExtent2D extent;
         vulkan::Framebuffer *framebuffer;
         vulkan::RenderPass *renderpass;
@@ -152,6 +157,9 @@ private:
         gbuffer.extent.width   =512;
         gbuffer.extent.height  =512;
 
+        gbuffer.present_complete_semaphore  =device->CreateSem();
+        gbuffer.render_complete_semaphore   =device->CreateSem();
+
         //根据候选格式表选择格式
         //const VkFormat position_format  =GetCandidateFormat(position_candidate_format,  sizeof(position_candidate_format));
         //const VkFormat color_format     =GetCandidateFormat(color_candidate_format,     sizeof(color_candidate_format));
@@ -208,6 +216,8 @@ private:
         if(!gbuffer.framebuffer)
             return(false);
 
+        gbuffer.rt=device->CreateRenderTarget(gbuffer.framebuffer);
+
         return(true);
     }
 
@@ -227,7 +237,7 @@ private:
 
     bool InitGBufferPipeline(SubpassParam *sp)
     {
-        AutoDelete<vulkan::PipelineCreater> pipeline_creater=new vulkan::PipelineCreater(device,sp->material,gbuffer.renderpass,gbuffer.extent);
+        AutoDelete<vulkan::PipelineCreater> pipeline_creater=new vulkan::PipelineCreater(device,sp->material,gbuffer.rt);
         pipeline_creater->Set(PRIM_TRIANGLES);
 
         sp->pipeline_solid=pipeline_creater->Create();
@@ -400,7 +410,7 @@ private:
             return(false);
 
         gbuffer_cmd->Begin();
-            if(!gbuffer_cmd->BeginRenderPass(gbuffer.renderpass,gbuffer.framebuffer))
+            if(!gbuffer_cmd->BeginRenderPass(gbuffer.rt))
                 return(false);
 
             render_list.Render(gbuffer_cmd);
@@ -408,7 +418,7 @@ private:
             gbuffer_cmd->EndRenderPass();
         gbuffer_cmd->End();
         
-        device->Submit(*gbuffer_cmd);
+        gbuffer.rt->Submit(*gbuffer_cmd,gbuffer.present_complete_semaphore,gbuffer.render_complete_semaphore);
 
         return(true);
     }
@@ -435,6 +445,15 @@ public:
         return(true);
     }
     
+    virtual void SubmitDraw(int index)
+    {
+        VkCommandBuffer cb=*cmd_buf[index];
+        
+        sc_render_target->Submit(cb,present_complete_semaphore,render_complete_semaphore);
+        sc_render_target->PresentBackbuffer(render_complete_semaphore);
+        sc_render_target->Wait();
+    }
+    
     void BuildCommandBuffer(uint32_t index) override
     {
         render_root.RefreshMatrix();
diff --git a/example/Vulkan/VulkanAppFramework.h b/example/Vulkan/VulkanAppFramework.h
index 34062d59..90050705 100644
--- a/example/Vulkan/VulkanAppFramework.h
+++ b/example/Vulkan/VulkanAppFramework.h
@@ -226,7 +226,7 @@ public:
         return sc_render_target->AcquireNextImage(present_complete_semaphore);
     }
 
-    void SubmitDraw(int index)
+    virtual void SubmitDraw(int index)
     {
         VkCommandBuffer cb=*cmd_buf[index];
         
diff --git a/inc/hgl/graph/vulkan/VKCommandBuffer.h b/inc/hgl/graph/vulkan/VKCommandBuffer.h
index e54d390e..4896a5f9 100644
--- a/inc/hgl/graph/vulkan/VKCommandBuffer.h
+++ b/inc/hgl/graph/vulkan/VKCommandBuffer.h
@@ -92,6 +92,7 @@ public:
     }
 
     bool BeginRenderPass(VkRenderPass rp,VkFramebuffer fb);
+    bool BeginRenderPass(RenderTarget *rt);
 
     bool Bind(Pipeline *p)
     {
diff --git a/inc/hgl/graph/vulkan/VKRenderTarget.h b/inc/hgl/graph/vulkan/VKRenderTarget.h
index ab6748bf..e663e1dc 100644
--- a/inc/hgl/graph/vulkan/VKRenderTarget.h
+++ b/inc/hgl/graph/vulkan/VKRenderTarget.h
@@ -53,6 +53,7 @@ public:
             const VkExtent2D &  GetExtent()const{return extent;}
     virtual const VkRenderPass  GetRenderPass()const{return fb->GetRenderPass();}
     virtual const uint32_t      GetColorCount()const{return fb->GetColorCount();}
+    virtual const VkFramebuffer GetFramebuffer()const{return fb->GetFramebuffer();}
 };//class RenderTarget
 
 /**
@@ -77,6 +78,7 @@ public:
     ~SwapchainRenderTarget();
 
     const   VkRenderPass  GetRenderPass()const override{return *main_rp;}
+    const   VkFramebuffer GetFramebuffer()const override{return render_frame[current_frame]->GetFramebuffer();}
             VkFramebuffer GetFramebuffer(const uint32_t index){return render_frame[index]->GetFramebuffer();}
 
     const   uint32_t      GetColorCount()const override{return 1;}
diff --git a/src/RenderDevice/Vulkan/VKCommandBuffer.cpp b/src/RenderDevice/Vulkan/VKCommandBuffer.cpp
index d81ef39c..71c24f18 100644
--- a/src/RenderDevice/Vulkan/VKCommandBuffer.cpp
+++ b/src/RenderDevice/Vulkan/VKCommandBuffer.cpp
@@ -1,6 +1,7 @@
 #include<hgl/graph/vulkan/VKCommandBuffer.h>
 #include<hgl/graph/vulkan/VKRenderPass.h>
 #include<hgl/graph/vulkan/VKFramebuffer.h>
+#include<hgl/graph/vulkan/VKRenderTarget.h>
 #include<hgl/graph/vulkan/VKPipeline.h>
 #include<hgl/graph/vulkan/VKBuffer.h>
 #include<hgl/graph/vulkan/VKMaterial.h>
@@ -86,6 +87,11 @@ bool CommandBuffer::BeginRenderPass(VkRenderPass rp,VkFramebuffer fb)
     return(true);
 }
 
+bool CommandBuffer::BeginRenderPass(RenderTarget *rt)
+{
+    return BeginRenderPass(rt->GetRenderPass(),rt->GetFramebuffer());
+}
+
 bool CommandBuffer::Bind(Renderable *render_obj)
 {
     if(!render_obj)