Porbably Poser 6. Poser Artist seems more like a 2D package to me... :s
Anyway, you can with 3D packages get a side view and front view of a person, and put them onto the viewports. Yuo can then painstakingly model from these 2 views to get the final image. I still haven't mastered that.
I dont know of a program that will take 2D info and make it 3D though automatically I'm afraid.