diff --git a/example/Vulkan/Atomsphere.cpp b/example/Vulkan/Atomsphere.cpp
index b5c2af2f..c2de3f9b 100644
--- a/example/Vulkan/Atomsphere.cpp
+++ b/example/Vulkan/Atomsphere.cpp
@@ -87,7 +87,7 @@ private:
 
     bool InitPipeline()
     {
-        vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetRenderPass(),device->GetExtent());
+        vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetMainRenderPass(),device->GetExtent());
         pipeline_creater->SetDepthTest(true);
         pipeline_creater->SetDepthWrite(true);
         pipeline_creater->SetCullMode(VK_CULL_MODE_NONE);
diff --git a/example/Vulkan/Deferred.cpp b/example/Vulkan/Deferred.cpp
index 9f6ea5fc..9b97bf9d 100644
--- a/example/Vulkan/Deferred.cpp
+++ b/example/Vulkan/Deferred.cpp
@@ -58,7 +58,7 @@ private:
 
     bool InitGBufferPipeline(SubpassParam *sp)
     {
-        vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,sp->material,device->GetRenderPass(),device->GetExtent());
+        vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,sp->material,device->GetMainRenderPass(),device->GetExtent());
         pipeline_creater->SetDepthTest(true);
         pipeline_creater->SetDepthWrite(true);
         pipeline_creater->SetCullMode(VK_CULL_MODE_BACK_BIT);
@@ -76,13 +76,13 @@ private:
 
     bool InitCompositionPipeline(SubpassParam *sp)
     {
-        vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,sp->material,device->GetRenderPass(),device->GetExtent());
+        vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,sp->material,device->GetMainRenderPass(),device->GetExtent());
         pipeline_creater->SetDepthTest(false);
         pipeline_creater->SetDepthWrite(false);
         pipeline_creater->SetCullMode(VK_CULL_MODE_NONE);
         pipeline_creater->Set(PRIM_TRIANGLES);
         sp->pipeline=pipeline_creater->Create();
-        
+
         if(!sp->pipeline)
             return(false);
 
@@ -94,11 +94,13 @@ private:
 
     bool InitMaterial()
     {
-        InitSubpass(&sp_gbuffer,        OS_TEXT("gbuffer_opaque.vert.spv"),OS_TEXT("gbuffer_opaque.frag.spv"));
-        InitSubpass(&sp_composition,    OS_TEXT("ds_composition.vert.spv"),OS_TEXT("ds_composition.frag.spv"));
+        if(!InitSubpass(&sp_gbuffer,        OS_TEXT("gbuffer_opaque.vert.spv"),OS_TEXT("gbuffer_opaque.frag.spv")))return(false);
+        if(!InitSubpass(&sp_composition,    OS_TEXT("ds_composition.vert.spv"),OS_TEXT("ds_composition.frag.spv")))return(false);
 
-        InitGBufferPipeline(&sp_gbuffer);
-        InitCompositionPipeline(&sp_composition);
+        if(!InitGBufferPipeline(&sp_gbuffer))return(false);
+        if(!InitCompositionPipeline(&sp_composition))return(false);
+
+        return(true);
     }
 
     void CreateRenderObject(vulkan::Material *mtl)
diff --git a/example/Vulkan/Geometry2D.cpp b/example/Vulkan/Geometry2D.cpp
index 1b894bd7..448a0e43 100644
--- a/example/Vulkan/Geometry2D.cpp
+++ b/example/Vulkan/Geometry2D.cpp
@@ -117,7 +117,7 @@ private:
         constexpr os_char PIPELINE_FILENAME[]=OS_TEXT("2DSolid.pipeline");
 
         {
-            vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetRenderPass(),device->GetExtent());
+            vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetMainRenderPass(),device->GetExtent());
             pipeline_creater->SetDepthTest(false);
             pipeline_creater->SetDepthWrite(false);
             pipeline_creater->CloseCullFace();
diff --git a/example/Vulkan/Geometry3D.cpp b/example/Vulkan/Geometry3D.cpp
index 34af30f1..7588116c 100644
--- a/example/Vulkan/Geometry3D.cpp
+++ b/example/Vulkan/Geometry3D.cpp
@@ -85,7 +85,7 @@ private:
     bool InitPipeline()
     {
         {
-            vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetRenderPass(),device->GetExtent());
+            vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetMainRenderPass(),device->GetExtent());
             pipeline_creater->SetDepthTest(true);
             pipeline_creater->SetDepthWrite(true);
             pipeline_creater->CloseCullFace();
diff --git a/example/Vulkan/InlineGeometryScene.cpp b/example/Vulkan/InlineGeometryScene.cpp
index e139a748..8111ade8 100644
--- a/example/Vulkan/InlineGeometryScene.cpp
+++ b/example/Vulkan/InlineGeometryScene.cpp
@@ -137,7 +137,7 @@ private:
 
     bool InitPipeline()
     {
-        vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetRenderPass(),device->GetExtent());
+        vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetMainRenderPass(),device->GetExtent());
         pipeline_creater->SetDepthTest(true);
         pipeline_creater->SetDepthWrite(true);
         pipeline_creater->Set(PRIM_LINES);
diff --git a/example/Vulkan/LoadModel.cpp b/example/Vulkan/LoadModel.cpp
index dadefae8..0e650c1e 100644
--- a/example/Vulkan/LoadModel.cpp
+++ b/example/Vulkan/LoadModel.cpp
@@ -165,7 +165,7 @@ private:
         constexpr os_char PIPELINE_FILENAME[]=OS_TEXT("2DSolid.pipeline");
 
         {
-            vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetRenderPass(),device->GetExtent());
+            vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetMainRenderPass(),device->GetExtent());
             pipeline_creater->SetDepthTest(false);
             pipeline_creater->SetDepthWrite(false);
             pipeline_creater->SetPolygonMode(VK_POLYGON_MODE_LINE);
diff --git a/example/Vulkan/SceneTree.cpp b/example/Vulkan/SceneTree.cpp
index 1c014e52..57d91c95 100644
--- a/example/Vulkan/SceneTree.cpp
+++ b/example/Vulkan/SceneTree.cpp
@@ -75,7 +75,7 @@ private:
     bool InitPipeline()
     {
         {
-            vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetRenderPass(),device->GetExtent());
+            vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetMainRenderPass(),device->GetExtent());
             pipeline_creater->SetDepthTest(true);
             pipeline_creater->SetDepthWrite(true);
             pipeline_creater->CloseCullFace();
diff --git a/example/Vulkan/VulkanAppFramework.h b/example/Vulkan/VulkanAppFramework.h
index 34424409..8b041b39 100644
--- a/example/Vulkan/VulkanAppFramework.h
+++ b/example/Vulkan/VulkanAppFramework.h
@@ -154,7 +154,7 @@ public:
         vulkan::CommandBuffer *cb=cmd_buf[index];
         
         cb->Begin();
-        cb->BeginRenderPass(device->GetRenderPass(),device->GetFramebuffer(index));
+        cb->BeginRenderPass(device->GetMainRenderPass(),device->GetFramebuffer(index));
         cb->Bind(p);
         cb->Bind(ds);
         cb->Bind(r);
@@ -186,7 +186,7 @@ public:
         vulkan::CommandBuffer *cb=cmd_buf[index];
 
         cb->Begin();
-        cb->BeginRenderPass(device->GetRenderPass(),device->GetFramebuffer(index));
+        cb->BeginRenderPass(device->GetMainRenderPass(),device->GetFramebuffer(index));
         rl->Render(cb);
         cb->EndRenderPass();
         cb->End();
@@ -226,7 +226,7 @@ public:
     {
         int index=AcquireNextImage();
 
-        if(index<0||index>swap_chain_count)return;
+        if(index<0||index>=swap_chain_count)return;
 
         SubmitDraw(index);
     }
diff --git a/example/Vulkan/indices_rect.cpp b/example/Vulkan/indices_rect.cpp
index cd2f88db..86092956 100644
--- a/example/Vulkan/indices_rect.cpp
+++ b/example/Vulkan/indices_rect.cpp
@@ -104,7 +104,7 @@ private:
     bool InitPipeline()
     {
         vulkan::PipelineCreater *
-        pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetRenderPass(),device->GetExtent());
+        pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetMainRenderPass(),device->GetExtent());
         pipeline_creater->SetDepthTest(false);
         pipeline_creater->SetDepthWrite(false);
         pipeline_creater->CloseCullFace();
diff --git a/example/Vulkan/main.cpp b/example/Vulkan/main.cpp
index 2be4adb2..dbed2526 100644
--- a/example/Vulkan/main.cpp
+++ b/example/Vulkan/main.cpp
@@ -107,7 +107,7 @@ private:
         constexpr os_char PIPELINE_FILENAME[]=OS_TEXT("2DSolid.pipeline");
 
         {
-            vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetRenderPass(),device->GetExtent());
+            vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetMainRenderPass(),device->GetExtent());
             pipeline_creater->SetDepthTest(false);
             pipeline_creater->SetDepthWrite(false);
             pipeline_creater->CloseCullFace();
@@ -122,7 +122,7 @@ private:
             void *data;
             uint size=filesystem::LoadFileToMemory(PIPELINE_FILENAME,(void **)&data);
 
-            vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetRenderPass(),device->GetExtent(),(uchar *)data,size);
+            vulkan::PipelineCreater *pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetMainRenderPass(),device->GetExtent(),(uchar *)data,size);
 
             pipeline=pipeline_creater->Create();
 
diff --git a/example/Vulkan/texture_rect.cpp b/example/Vulkan/texture_rect.cpp
index 4e2ab82c..73f45d84 100644
--- a/example/Vulkan/texture_rect.cpp
+++ b/example/Vulkan/texture_rect.cpp
@@ -141,7 +141,7 @@ private:
     bool InitPipeline()
     {
         vulkan::PipelineCreater *
-            pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetRenderPass(),device->GetExtent());
+            pipeline_creater=new vulkan::PipelineCreater(device,material,device->GetMainRenderPass(),device->GetExtent());
         pipeline_creater->SetDepthTest(false);
         pipeline_creater->SetDepthWrite(false);
         pipeline_creater->CloseCullFace();
diff --git a/inc/hgl/graph/vulkan/VKDevice.h b/inc/hgl/graph/vulkan/VKDevice.h
index 7af3ce9f..e9036fab 100644
--- a/inc/hgl/graph/vulkan/VKDevice.h
+++ b/inc/hgl/graph/vulkan/VKDevice.h
@@ -68,7 +68,7 @@ public:
 
     const   uint32_t        GetSwapChainImageCount  ()const     {return attr->sc_texture.GetCount();}
 
-            RenderPass *    GetRenderPass           ()          {return main_rp;}
+            RenderPass *    GetMainRenderPass       ()          {return main_rp;}
             Framebuffer *   GetFramebuffer          (int index) {return render_frame[index];}
     const   uint32_t        GetCurrentFrameIndices  ()          {return current_frame;}
             Framebuffer *   GetCurrentFramebuffer   ()          {return render_frame[current_frame];}