Thanks for the help! Riggin Dojo is a great resource, been reading a bit over there.
I have been doing a lot of searching on the subject. I don’t think that Unity has support for set driven keys, but I think I know enough to write a script to drive helper bones within Unity.
I found this video which helped me understand the concept a bit better:
I can see how for flexing a biped could be achieved with this method. Arm bends, joint in the center of the upper arm that is mapped to the biped verts moves outwards. I am still having trouble figuring out how this would work to prevent the elbow from collapsing, or deform better.
Is the workflow here to look for problem areas at extreme angles and how a helper bone would help, then wiring it up?
Do you know of any other resources on this subject? I found this Jason Parks’ site which has good info.