Texture and smooth with vertex normal average

Hello,

Many surfaces with texture look fine when rendering with face normal, but if rending with vertex normal average method, the texture look odd, and there seems more extra triangles added.

Could anyone help to explain if it is possible to apply both vertex normal average shading and Texture together at the same time? Any poiner is welcome. Thanks.

take a look at this article:

smooth normal generation article

hope it helps.