I do try to keep the postwork to a minimum, mainly to fix small inconsistencies, blend edges, and composite multiple renders. I often render a scene twice, once with shadows, once without, and do a layer rub-thru to eliminate unwanted shadows. I find this takes less time than trying to tweak the lighting and get it right inside of Poser. Even things like rays, plasma-bolts, explosion, etc. I like to do them as part of the 3d scene, instead of posting them in. So to a degree, I am a purist. But, there is simply no way I would eliminate postwork. Occasionally I get a render that needs none, whatsoever, but that is rare.