diff --git a/CMCore b/CMCore
index 1f1d1b80..74d603fd 160000
--- a/CMCore
+++ b/CMCore
@@ -1 +1 @@
-Subproject commit 1f1d1b80350a40bfeaf50ab6cf8c6be8a613c374
+Subproject commit 74d603fd234daca29114b7b23245604a1bb5170c
diff --git a/example/Vulkan/OffscreenRender.cpp b/example/Vulkan/OffscreenRender.cpp
index 7a5a3a70..f1b56e41 100644
--- a/example/Vulkan/OffscreenRender.cpp
+++ b/example/Vulkan/OffscreenRender.cpp
@@ -140,7 +140,7 @@ public:
         rect.material_instance=db->CreateMaterialInstance(OS_TEXT("res/material/Texture2D"));        
         if(!rect.material_instance)return(false);
 
-        rect.pipeline=CreatePipeline(rect.material_instance,vulkan::InlinePipeline::Solid2D);
+        rect.pipeline=CreatePipeline(rect.material_instance,vulkan::InlinePipeline::Alpha2D);
         if(!rect.pipeline)return(false);
 
         rect.sampler=db->CreateSampler();
@@ -159,7 +159,7 @@ public:
 
             rect.renderable_instance=db->CreateRenderableInstance(render_obj,rect.material_instance,rect.pipeline);
         }
-    
+        
         BuildCommandBuffer(rect.renderable_instance);
 
         return(true);
@@ -170,6 +170,8 @@ public:
         if(!VulkanApplicationFramework::Init(SCREEN_WIDTH,SCREEN_HEIGHT))
             return(false);
 
+        SetClearColor(COLOR::MozillaCharcoal);
+
         if(!InitOffscreen())
             return(false);
 
diff --git a/example/common/VulkanAppFramework.h b/example/common/VulkanAppFramework.h
index 719178d5..caf50016 100644
--- a/example/common/VulkanAppFramework.h
+++ b/example/common/VulkanAppFramework.h
@@ -55,6 +55,8 @@ protected:
 
     vulkan::CommandBuffer **        cmd_buf                     =nullptr;
 
+            Color4f                 clear_color;
+
 protected:
 
     vulkan::Database *              db                          =nullptr;
@@ -77,6 +79,8 @@ public:
     {
         hgl_zero(key_status);
 
+        clear_color.Zero();
+
     #ifdef _DEBUG
         if(!vulkan::CheckStrideBytesByFormat())
             return(false);
@@ -187,6 +191,11 @@ public:
         cb->End();
     }
 
+    void SetClearColor(COLOR cc)
+    {
+        clear_color.Use(cc,1.0);
+    }
+
     void BuildCommandBuffer(uint32_t index,vulkan::RenderableInstance *ri)
     {
         if(!ri)
@@ -196,6 +205,8 @@ public:
 
         vulkan::CommandBuffer *cb=cmd_buf[index];
 
+        cb->SetClearColor(0,clear_color.r,clear_color.g,clear_color.b);
+
         cb->Begin();
             cb->BindFramebuffer(sc_render_target->GetRenderPass(),sc_render_target->GetFramebuffer(index));
                 cb->BindPipeline(ri->GetPipeline());