I was thinking of that too, the original sketch looked like a zombie, the CGI character's ribs on the other hand were too large to be his own but that's the good in scarce visual reference, it's up to me how to imagine it. I was thinking of something similar stoff to the bone armour. Kain's wear also needed several change, the low polygon CGI model's stuff doesn't works on a realistic proportioned body.
Nope, just pick the right person and boil the flesh and tissue off the bones
Actually the ribcages weren't difficult, didn't counted if it actually has the anatomy correct number of bones, just meant it to be a mages' wear.