This exercise was extremely educational. A couple of years ago, in an effort to pump more realism into my character animation, I developed a muscle system for 3ds Max loosely inspired by the way the Ziva muscle system operates. It was a great refresher on anatomy—instead of a single muscular body model, I rigged each muscle group separately, each with its own skin morphs. On top of the muscles will go a mesh representing the fascia, and I'm considering adding some dynamic objects to simulate fat deposits. Haven't touched this project in a while, but if anything, now I've got a great anatomy reference.