for me the texture is too uniform (on the bump at least). What about giving it a smoother underbelly and larger scales ontop? At the moment the bump looks almost like carpet
Also I'm sure it's been asked but what's up with the antialiasing? is that just to cut rendertimes down? be nice to see a full blown pic just to really crit the texture properly.

Alan
Technical Director - Framestore
Currently working on: Your Highness
IMDB