Well, without a script, the way I could think of doing this is the following: Duplicate a copy of the unposed face. Split it in half, and detach the two halves so they are two seperate meshes. Take your posed face, and do the same to it. Then match each half up with its corresponding mate on the unposed face, attach the…
I am reading a book called Stop Staring: Facial Modeling and Animation Done Right By Jason Osipa and in the book he creates his blend shapes using both sides of the face at the same time and then after creating his set, he uses this plugin for maya called xyWeightedBlend.mll to create two different blend shapes (one that…