The function ID3DXTextureGutterHelper is not required, but can be useful for UVAtlas. It is not currently implemented as part of DirectXTex or DirectXMesh, and like UVAtlas itself combines elements of texture and mesh processing.

This could be useful functionality to consider adding to the library.

ID3DXTextureGutterHelper.ResampleTex was added in the DirectX SDK (August 2005) release.

This is required to implement the /rt switch for the uvatlas sample.