To the Original Poster, I personally wouldn't try to make something out of nothing. Much of photography is about the quality of the light and background and not the target subject. It's the difference between a record shot and something of stature. Personally, I limit my post production to what ever I can efficiently do in Lightroom. But there always are exceptions, If I had a paying client who needed a specific shot to be taken on a day with poor quality of light and they had a lot of need and expectation....then yes I would pull a rabit out of the hat for them. If it was a photograph for stock or personal use....no, I would return on on a day where there was better light and a more interesting composition. I like to get as much as I can in camera.
There are other more "arty" types who say..."hey! Anything goes" and that's fine too...it's just not the path I choose to walk.
I would post a nice piccy here...but Flickr has made a mess with my account and I can't seem to view anything!