The best CG films, with hundreds of millions of dollars behind them, still have to use post-work in their films to fix certain things. That's why programs like After Effects and Nuke still exist. There's not a single one out there that doesn't use post work to some extent, even in 2014. 

Breasts are built the way they're built so that clothing looks decent on them, and the figure doesn't look like the cover of a national geographic mag. There are morphs and JCMs to correct where they need to be corrected. If breasts looked like that then most of these poser stores probably wouldn't exist, and without them this forum doesn't exist either, cause nothing would be paying the bills to keep the place running.