Just a quick post. I’ve been messing around a bit with facial rigging.
The tricky bit is that it needs to fit within the framework of the autorigging system, and needs to be fast to set up for background characters without much manual work, and also needs to be flexible enough to let us get really top-notch results for main characters.
After discussions with Angela and some tests, I’ve settled on a hybrid approach between bones and shape keys. The idea is that even with only bones, the face rig should work well enough for background characters. But it will be supplemented with shape keys for main characters. Things like lip roll, nostril flare, squinting around the eyes, etc. will be done with shape keys. Corrective shape keys will also be used to preserve volume and define creases better.
This is a test of the bone-only setup for the mouth area:
It’s not perfect, and the facial expressions don’t necessarily match her character, but it’s a good proof-of-concept, I think.