I'm a purist in every 3D program I use. That's not to say that I don't do touchups on a lot of my work, but rather I try very hard to avoid having to. My reason is simply that I want every model I make, every scene I set up to work as an animation or still. It's certainly easy enough to deal with poke-throughs and glowing nostrils in a still image, but life is too short to do that for even one second of animation. Why couldn't they have made Poser so the renderer would always draw the clothes over the corresponding body part? I know it'd be a cheat, but it would save the purists alot of grief.