diff --git a/inc/hgl/graph/VKCommandBuffer.h b/inc/hgl/graph/VKCommandBuffer.h
index 416584f5..37589d61 100644
--- a/inc/hgl/graph/VKCommandBuffer.h
+++ b/inc/hgl/graph/VKCommandBuffer.h
@@ -179,6 +179,8 @@ public: //draw
     void NextSubpass(){vkCmdNextSubpass(cmd_buf,VK_SUBPASS_CONTENTS_INLINE);}
 
     void EndRenderPass(){vkCmdEndRenderPass(cmd_buf);}
+
+public: //dynamic state
 };//class RenderCmdBuffer:public GPUCmdBuffer
 
 class TextureCmdBuffer:public GPUCmdBuffer
diff --git a/inc/hgl/graph/VKPhysicalDevice.h b/inc/hgl/graph/VKPhysicalDevice.h
index 702c0caf..c2629c50 100644
--- a/inc/hgl/graph/VKPhysicalDevice.h
+++ b/inc/hgl/graph/VKPhysicalDevice.h
@@ -23,6 +23,10 @@ class GPUPhysicalDevice
     List<VkExtensionProperties>         extension_properties;
     List<VkQueueFamilyProperties>       queue_family_properties;
 
+private:
+
+    bool dynamic_state=false;
+
 public:
 
     GPUPhysicalDevice(VkInstance,VkPhysicalDevice);
@@ -146,18 +150,20 @@ public:
     const VkBool32  SupportYcbcrConversion      ()const{return features11.samplerYcbcrConversion;}
     const VkBool32  SupportClampMirrorToEdge    ()const{return features12.samplerMirrorClampToEdge;}
 
-    const void      GetPointSize(float &granularity,float &min_size,float &max_size)
+    const void      GetPointSize(float &granularity,float &min_size,float &max_size) const
     {
         granularity =properties.limits.pointSizeGranularity;
         min_size    =properties.limits.pointSizeRange[0];
         max_size    =properties.limits.pointSizeRange[1];
     }
 
-    const void      GetLineWidth(float &granularity,float &min_width,float &max_width)
+    const void      GetLineWidth(float &granularity,float &min_width,float &max_width) const
     {
         granularity =properties.limits.lineWidthGranularity;
         min_width   =properties.limits.lineWidthRange[0];
         max_width   =properties.limits.lineWidthRange[1];
     }
+
+    const bool      SupportDynamicState() const {return dynamic_state;}
 };//class GPUPhysicalDevice
 VK_NAMESPACE_END
diff --git a/src/SceneGraph/Vulkan/VKDeviceCreater.cpp b/src/SceneGraph/Vulkan/VKDeviceCreater.cpp
index 0ba56964..a78308ba 100644
--- a/src/SceneGraph/Vulkan/VKDeviceCreater.cpp
+++ b/src/SceneGraph/Vulkan/VKDeviceCreater.cpp
@@ -30,6 +30,7 @@ namespace
         #ifdef _DEBUG
             VK_EXT_DEBUG_MARKER_EXTENSION_NAME,
         #endif//_DEBUG
+            VK_EXT_EXTENDED_DYNAMIC_STATE_EXTENSION_NAME,
 //            VK_KHR_PUSH_DESCRIPTOR_EXTENSION_NAME,
 //            VK_EXT_HDR_METADATA_EXTENSION_NAME,
 //            VK_EXT_FULL_SCREEN_EXCLUSIVE_EXTENSION_NAME,
diff --git a/src/SceneGraph/Vulkan/VKPhysicalDevice.cpp b/src/SceneGraph/Vulkan/VKPhysicalDevice.cpp
index f2fda25b..7360f90e 100644
--- a/src/SceneGraph/Vulkan/VKPhysicalDevice.cpp
+++ b/src/SceneGraph/Vulkan/VKPhysicalDevice.cpp
@@ -153,6 +153,8 @@ GPUPhysicalDevice::GPUPhysicalDevice(VkInstance inst,VkPhysicalDevice pd)
 
         debug_queue_family_properties_out(debug_front.c_str(),queue_family_properties);
     }
+
+    dynamic_state=CheckExtensionSupport(VK_EXT_EXTENDED_DYNAMIC_STATE_EXTENSION_NAME);
 }
 
 const bool GPUPhysicalDevice::GetLayerVersion(const AnsiString &name,uint32_t &spec,uint32_t &impl)const