Jean-Francois Lepine works as Lead Character Artist for a game development studio in Foster City, California. Some of his personal work is posted at CGSociety. He discribes the walk cycle (image above) as follows: "Technical Animaton in XSI using mostly curves as trajectory. Skin muscles and face expressions are a combination of shape keys, plotted deformation, SDKs and other blended deformations. Rendered in mental ray..."