Here is an example of one study that I have mixed feelings about. The original image (top) is from a Sergio Leone movie title Once Upon A Time In America. It's a movie about Jewish mobsters during the times of Prohibition. As per Leone's usual, it carries that on-screen deliciousness. Well lit and well framed. So I did from the movie frame and then tried (below) to see if I could change up the lighting but still keep the same overall composition.
This is a side-by-side study I did of a rock that I found doing a google image search of "Grand Canyon rock formations." I picked this because I know what with the Grand Canyon I was going to get some rich orange, reds and some really cool violet hues. I love this combination, I love the violets and oranges that you see. Love it!! I have to visit there so I can do traditional studies. Also, a concentration here, was the swooping shapes of the rocks. Cool stuff.