Modifying a three-dimensional model includes constructing a bones infrastructure for a polygon mesh, removing edges of polygons in the polygon mesh to reduce a resolution of the polygon mesh, receiving an instruction to reduce a number of bones in the bones infrastructure, reducing the number of bones...http://www.google.com/patents/US6924804?utm_source=gb-gplus-sharePatent US6924804 - Reducing the resolution of bones in a three-dimensional model