[Ben]

Well I've experimented on several images lit several different ways and and I've found the better the lighting is on the original image the better the retouching looks. If the original was an uninteresting flat lit snapshot, the PP one is going to be a retouched uninteresting flat lit snapshot, but if the original was a beautiful well lit portrait, the pp image is going to be a retouched well lit image that looks even more beautiful.

One last thing, images on your computer screen will look considerably different from the same image printed onto photographic paper.

Ben