Here is a quick experiment I did. I don't know if it fits the bill at all, but here is how I got it (mind, the whole thing wants some work, I did it in a couple minutes). First I did a render with the GI and such, that looked nice, but not very crisp. Then I turned the backdrop to black (so it overwrites the background image I was using), and turned all the lights to zero, and removed all ambient light, etcetera. I then rendered it, and got just the reflections of the background, everything else was black. I took this image, and placed it over the first in Corel PP 9, using additive, so that it boosted the reflections, while adding nothing to the rest. As I said, it was a quick thought.

EMC