During this talk, I present my recent work on temporally coherent stylization of 3D animations. In particular, I describe a method for accurately computing the contours of a smooth 3D surface to produce animated line drawings. This approach generates, for each viewpoint, a triangle mesh with contours that are topologically equivalent to those of the original surface. The visible contours of the mesh can then be accurately computed and textured by standard methods. I also present a method that creates temporally coherent stylized animations by example, extending the technique of Image Analogies. To make the method art directable, we allow artists to paint keyframes that are used as constraints. The in-betweens calculated by this method maintain stylistic continuity and yet change no more than necessary over time.