Anatomy For 3d Artists The Essential Guide For Cg [upd] -
Open your current character model. Check the ankle bones. Check the clavicle angle. Fix one single anatomical mistake today. Render it. Compare it to a photo. See the difference.
Muscles provide the volume and shape of the body. For 3D artists, the focus should be on origin and insertion points. Anatomy For 3d Artists The Essential Guide For Cg