I'm not sure how the CG artists do it, but I 'm sure that those breast the size and shape of zeppelins, which don't hang down to the knees, are actually filled with helium. Thus, they defy gravity if not the imagination.

Really though, Poser artists are not interested in realism, they want ULTRArealism where anything is possible.

Probably edited for spelling, grammer, punctuation, or typos.