#Facial Animation
One of the tricks employed by the masters is to use a 3-D package to
animate the gross motor movements in the human face and then to use
Elastic Reality (a 2-D warping, morphing, animation, compositing, etc
system) to do the really fine motor stuff.
Essentially modellers try to get things as close as reasonable within
their 3-D environment but don't sweat the last details there. Instead,
the unique shape-to-shape interface that Elastic Reality offers is
ideally suited for making tweaks.
Perry (why, oh why can't I access the Elastic Reality section here?)