For the past few months, I’ve been digging pretty deeply into rigging.
I’ve read discussions on using bones vs. shape keys…but then I came across this rig, which uses a combination of shape keys (for the eyebrows) and lattices that interact with vertex groups for the mouth shapes.
There is a lattice modifier on the face. The greater the strength of the modifier, the more a specific vertex group on the face gets deformed so that it matches the shape of the lattice.
As a side note, this can have a sort of weird effect if you move the face mesh without also moving the lattice. The shape of where the lattice is remains the same, but the vertex group will continue to be affected, albeit in a different spot:
Anyway, my question is, what advantages/disadvantages do lattices have over using shape keys?