Hi there,
I found this on the web at Softimage site (now acquired by Autodesk...)

Does anyone know how this could be achieved in Maya?

The XSI flow is as follows:
Flow for Facial Rig Construction
1. Low polygon model activated with blendshape animation
2. Bones fixed on top
3. Enveloped polygon meshes for these bones
4. Tangent color
5. OpenGL display (wrinkles also expressed with a normal map)

see link for video

https://www.softimage.jp/user_case/mg...nake_face.html

Thanks

regards

Jim