GPU Instancing all Material Black

I create a quad mesh and call Graphics.DrawMeshInstanced() draw tree leaves. The material is transparent and the shape of leaves is correct but all color is gone. The bottom leaf mesh is draw by Graphics.DrawMesh() with the same material and mesh. I test other material and enable GPU Instancing. I am new to Unity and any hint would be appreciated.

 

Problem solved. I set the wrong scale._з」∠)_