animating mesh division and holes I'm doing some mesh morphs using shape keys and the shrink wrap modifier with sub surf to get the mesh to mold to the shape of things i want it to shape into. the problem is when i have things with loops, holes, and separate pieces. whats the best way To go about animating dividing mesh and holes. 

i drew this quick little sketch example of what i'm after showing a sphere turning into a doughnut.
You need to use boolean modifier and animate the boolean object to cut your mesh.