I think a) it's a tall order and b) there isn't enough money in it. If it was otherwise it would've been done already. I think a high degree of simulation would be necessary to accurately model a human. Bones float a bit. Tendons deform skin. Muscles contract and expand and deform skin. Think of all that goes on in just the ribcage in breathing. Anatomists still don't agree on how many muscles there are in the human face! Poser is old tech in a lot of ways. The whole bump mapping/normal mapping thing is still light years away from being properly realized in Poser & Poser content. This suggests to me the obvious, that Poser is a niche app mostly used by hobbyists. Spending a few grand might get you something better. :)