SoukiZERO is a Character TD supervisor at Motion Magic. Here, he shows how he created the interactive controllers for his Facial Rig that was based on FACS (Facial Action Coding System).
this is expensive to create wrap deformer for each controller.
Souki breaks down the technique using smaller examples. A little while ago, I posted a tutorial where Head of Content for Nimble Collective Jason Schleifer, showed how to create interactive controllers that were able to deform along with the character. This was done by using Maya’s Wrap Deformer.
Suuki notes that it can get really expensive to create wrap deformers for every single controller. Maya will slow down considerably.
The facial rig shown in the examples is available for purchase. The facial rig is based on FACS, and has interactive controllers with over 100 joints that deform the model. No Blend-Shapes at all are used.
The rig also includes skin wrinkles that use a custom DX11 shader which is able to blend several normal maps and displacement maps with masks.