- tracking in Mocha (at 1:52)
- making the mouth larger (at 11:44)
- modifying the face (at 22:00)
This is a really fun project where we turn a face into a monster face. You learn advanced tracking techniques to modify the mouth and other parts of the face. Due to Mocha, this is comparably easy although the face is heavily moving. For the skin of the monster face, we use among other things After Effects' cell pattern effect.
Also check out the Demon Face Warp tutorial at videocopilot.net, which has a similar visual result but uses very different techniques.