Quote - Take a look at Poser Physics http://www.contentparadise.com/productdetails.aspx?id=527

That only does hard body / ragdoll simulations. For real soft body sims, you can't use the shell meshes that 3D modelling programs generate, you need ones with internal structure (i.e. tetrahedral/hexahedral meshes), c.f. -> http://en.wikipedia.org/wiki/Finite_element_method