If only collision worked.... You bend a knee or an elbow,,, the flesh has to displace on the x axis and compress. Unless you accept morph poses. Which are a compromise. People have so many dials as it is. I've looked hard at it. Gravity plays in as well. Nothing delivers even 80%. Yeah you can make it better but change the axis and it no longer makes sense. A super lean male on his stomach looks nothing at all like a lean male on his back (180'Xrot). Rib shifts,,,gravity. Anti gravity flexing. Lots of dials... Elbows the perfect example. 0 bend versus 130o bend. How to get the elbow bone to isolate from the flesh? The human form is a very difficult thing to copy and I guess what makes it one of the challenges in cgi Plenty of places to study if you want a crack at it. Weight based rigging would be great.