Never heard of "backface culling" so I Googled it. It seems to me something to do with Open GL rendering. I always use software rendering in Daz Studio.

Following link to a couple of forum on the matter. Hope it helps.

http://www.linuxquestions.org/questions/programming-9/backface-culling-in-opengl-275229/

http://blenderartists.org/forum/showthread.php?t=138573