diff --git a/inc/hgl/graph/VKArrayBuffer.h b/inc/hgl/graph/VKArrayBuffer.h
index d72ec2e1..62920adc 100644
--- a/inc/hgl/graph/VKArrayBuffer.h
+++ b/inc/hgl/graph/VKArrayBuffer.h
@@ -19,7 +19,8 @@ namespace hgl
         {
         protected:
 
-            uint unit_size;
+            uint align_size;
+            uint range_size;
 
             VKMemoryAllocator *vk_ma;
 
@@ -32,7 +33,7 @@ namespace hgl
 
         private:
 
-            GPUArrayBuffer(VKMemoryAllocator *,const uint);
+            GPUArrayBuffer(VKMemoryAllocator *,const uint,const uint);
 
             friend class GPUDevice;
 
@@ -40,10 +41,12 @@ namespace hgl
         
             virtual ~GPUArrayBuffer();
 
-            const uint32_t  GetUnitSize()const{return unit_size;}
+            const uint32_t  GetAlignSize()const{return align_size;}     ///<数据对齐字节数
+            const uint32_t  GetRangeSize()const{return range_size;}     ///<单次渲染访问最大字节数
+
             DeviceBuffer *  GetBuffer();
 
-            uint32          Alloc(const uint32 max_count);            ///<预分配空间
+            uint32          Alloc(const uint32 max_count);              ///<预分配空间
             void            Clear();
 
             template<typename T>
@@ -55,7 +58,7 @@ namespace hgl
 
                 if(!ptr)return(false);
 
-                ubo_access->Start((uchar *)ptr,unit_size,count);
+                ubo_access->Start((uchar *)ptr,align_size,count);
                 return(true);
             }
 
diff --git a/inc/hgl/graph/VKDevice.h b/inc/hgl/graph/VKDevice.h
index 888e18b1..51084e8e 100644
--- a/inc/hgl/graph/VKDevice.h
+++ b/inc/hgl/graph/VKDevice.h
@@ -137,6 +137,8 @@ public: //Buffer相关
 
     const VkDeviceSize GetUBOAlign();
     const VkDeviceSize GetSSBOAlign();
+    const VkDeviceSize GetUBORange();
+    const VkDeviceSize GetSSBORange();
 
 #define CREATE_BUFFER_OBJECT(LargeName,type)    DeviceBuffer *Create##LargeName(                   VkDeviceSize size,void *data,  SharingMode sm=SharingMode::Exclusive)  {return CreateBuffer(VK_BUFFER_USAGE_##type##_BUFFER_BIT,size ,size,data,      sm);} \
                                                 DeviceBuffer *Create##LargeName(                   VkDeviceSize size,             SharingMode sm=SharingMode::Exclusive)  {return CreateBuffer(VK_BUFFER_USAGE_##type##_BUFFER_BIT,size ,size,nullptr,   sm);} \
diff --git a/src/SceneGraph/Vulkan/VKArrayBuffer.cpp b/src/SceneGraph/Vulkan/VKArrayBuffer.cpp
index 773f7ef9..4301808d 100644
--- a/src/SceneGraph/Vulkan/VKArrayBuffer.cpp
+++ b/src/SceneGraph/Vulkan/VKArrayBuffer.cpp
@@ -10,33 +10,34 @@ namespace hgl
     {
         GPUArrayBuffer *GPUDevice::CreateUBO(const VkDeviceSize &item_length)
         {
-            const uint unit_size=hgl_align<VkDeviceSize>(item_length,GetUBOAlign());
+            const uint align_size=hgl_align<VkDeviceSize>(item_length,GetUBOAlign());
             
-            auto vk_ma=new VKMemoryAllocator(this,VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,unit_size);
+            auto vk_ma=new VKMemoryAllocator(this,VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,align_size);
 
-            return(new GPUArrayBuffer(vk_ma,unit_size));
+            return(new GPUArrayBuffer(vk_ma,align_size,GetUBORange()));
         }
 
         GPUArrayBuffer *GPUDevice::CreateSSBO(const VkDeviceSize &item_length)
         {
-            const uint unit_size=hgl_align<VkDeviceSize>(item_length,GetSSBOAlign());
+            const uint align_size=hgl_align<VkDeviceSize>(item_length,GetSSBOAlign());
             
-            auto vk_ma=new VKMemoryAllocator(this,VK_BUFFER_USAGE_STORAGE_BUFFER_BIT,unit_size);
+            auto vk_ma=new VKMemoryAllocator(this,VK_BUFFER_USAGE_STORAGE_BUFFER_BIT,align_size);
 
-            return(new GPUArrayBuffer(vk_ma,unit_size));
+            return(new GPUArrayBuffer(vk_ma,align_size,GetSSBORange()));
         }
     }//namespace graph
 
     namespace graph
     {
-        GPUArrayBuffer::GPUArrayBuffer(VKMemoryAllocator *va,const uint us)
+        GPUArrayBuffer::GPUArrayBuffer(VKMemoryAllocator *va,const uint as,const uint rs)
         {
             vk_ma=va;
-            unit_size=us;
+            align_size=as;
+            range_size=rs;
 
             MemoryBlock *mb=new MemoryBlock(vk_ma);
 
-            coll=new Collection(unit_size,mb);
+            coll=new Collection(align_size,mb);
         }
 
         GPUArrayBuffer::~GPUArrayBuffer()
@@ -69,7 +70,7 @@ namespace hgl
 
         void GPUArrayBuffer::Flush(const uint32 count)
         {
-            vk_ma->Flush(count*unit_size);
+            vk_ma->Flush(count*align_size);
         }
     }//namespace graph
 }//namespace hgl
diff --git a/src/SceneGraph/Vulkan/VKDeviceBuffer.cpp b/src/SceneGraph/Vulkan/VKDeviceBuffer.cpp
index 5e53feaf..57932461 100644
--- a/src/SceneGraph/Vulkan/VKDeviceBuffer.cpp
+++ b/src/SceneGraph/Vulkan/VKDeviceBuffer.cpp
@@ -4,15 +4,10 @@
 #include<hgl/graph/VKPhysicalDevice.h>
 
 VK_NAMESPACE_BEGIN
-const VkDeviceSize GPUDevice::GetUBOAlign()
-{
-    return attr->physical_device->GetUBOAlign();
-}
-
-const VkDeviceSize GPUDevice::GetSSBOAlign()
-{
-    return attr->physical_device->GetSSBOAlign();
-}
+const VkDeviceSize GPUDevice::GetUBOAlign   (){return attr->physical_device->GetUBOAlign();}
+const VkDeviceSize GPUDevice::GetSSBOAlign  (){return attr->physical_device->GetSSBOAlign();}
+const VkDeviceSize GPUDevice::GetUBORange   (){return attr->physical_device->GetUBORange();}
+const VkDeviceSize GPUDevice::GetSSBORange  (){return attr->physical_device->GetSSBORange();}
 
 bool GPUDevice::CreateBuffer(DeviceBufferData *buf,VkBufferUsageFlags buf_usage,VkDeviceSize range,VkDeviceSize size,const void *data,SharingMode sharing_mode)
 {