http://www.dcs.shef.ac.uk:80/research/groups/graphics/demo.html
On this page, created by the Computer Graphics Research Group at Sheffield University, UK, you will find links including -- Modeling and Animation Control of Deformable Objects, Computer Animation using Implicit Surfaces, Physically Based Modeling of Humans for Computer Animation, Surface Reconstruction from Medical Data, Fluid Dynamics Visualization, and Modeling Imperfections. You can view a series of thumbnail previews or the full size JPEG images (the file sizes are listed for each image). The animation option leads to a page which uses MPEG animations to demonstrate the concept of Implicit Surfaces.