I went back to some of the early concepts of the first creature that was posted back when I started this post and painted up two of the leg concepts I worked on.  These two design did not make it into the final character, but I enjoyed so much just painting it up.

This is a model sheet I did of a muscle anatomy for a rat warrior I worked with for my 3D modeler Artist John Varner to construct and model.  We went through many phases of design especially to see what works and what didn't before we decided to build this character.  The muscle was a main concern of this character for it's look in terms of the design outcome.