/3/ - 3DCG

what's a good tutorial, either as a book or video series, that covers making polymodels/rigs like this where they bend really cleanly even without blendshapes in maya? i can't find anything that actually shows how to make this work. it usually covers basic rigging techniques, which is fine, and that constraints exist, but implementing them for a wrist or muscle group seems impossible without morph targeting to the result. also there's no normal map for this either and i can't grasp how the muscle crests were modeled in. the artist said they used booleans but i still can't get it. is there anything in English that goes over similar methods? he used basic plains for the hands and feet from what i could read.