◾ Control Freaks! How to Make Fluids Do What We Want
Usually, we stir up uids with a swine’s hair and see what happens. at is not acceptable for animators who want to create a particular special eect involving a uid animation. Let’s say you want your uid over time to move some density into a particular shape. In the interim, you want the uid to look natural and nice and smooth while possibly following the laws of physics.