Ken Musgrave , MetaCreations 3D Rendering Effects for 2D Animation 3D shading and rendering techniques can be applied to animated drawings, after automatically constructing surfaces from the drawings.
Modeled surfaces can also track drawings to produce shaded and textured animation.
A simple image-based rendering technique for producing a clean plate from the original background. Simply put, the algorithm makes a hole where the bad pixels are, then uses neighboring frames to incrementally fill the hole with good pixels. In this process, motion blur is applied to cel animation sequences through the use of optical flow estimation and line-integral convolution.