A few screenshots from the Muscle setup I’ve prepared for Mongrel. I’ve taken a bit of “artistic licence” when setting them up so not all of them necessarily anatomically correct. Firstly because Mongrel’s anatomy is a hybrid of different species and also simply to better serve the skinning purpose.
I’ve used Maya Muscle Creator which allows me to pretty much completely re-sculpt squash and stretch stages of each muscle. This is a great feature allowing for more realistic muscle deformations and skin sliding effects.