md3 model format to iqm, or md5., and that results in my question: In other words I want to change from the current. Well, I want to change the player/models animation system from a key/frame based system to a skeletal anaimation system (a physics engine needs skeletal models). Afaik, most of the work was done by zturtleman, again. Another impressive feature of ioquake3, unfortunately not much used as well. Ioquake3 added support for a model format called inter-quake-model (iqm).