I'm always scouting for new locations and note it down when I do find something interesting. Recently, I came across a vast area filled with cut down tree trunks and knew it'd make for a great background. At the time I wanted to put a potential subject right there on location coming back another day, but realised it could make for a good background in a composite in the future as well. So I took a few shots, noted down distance to subject and hight of my tripod, focal length and general direction of light. Sometime later, using these noted measurements, I shot the subject in studio using 3 strobes (cross lit) at 1/4 and 1/8 ratios right to left with the third strobe providing the 'kicker' light on the hair at 1/16 power. After that, I put the subject in the background, spent a fair amount of time processing it for a movie poster quality feel and finished off with a gradient map/soft brush work for the transition effect. I deliberately chose a blue/orange colour key as they're complementary colours.