And this is why it's such a pain to get decent renders if you are just an end user and rely on vendor maps. Your average Poser user doesn't have ZBrush or Maya or any other tool like that. They got Poser and expect a semi-decent render. 
Please understand I'm not bashing those who very generously share their knowledge here (it is incredible generosity); I'm just trying to come to this, for years and years now, as someone who purposefully and for the lack of time and finances, have no tools other than Poser and whatever freeware one can scrounge up.