I get asked constantly if someone can "base" a painting off of one of my photographs. More often, someone just does it and then demands my permission after the fact ...About 35 years ago, I did something similar ...I found a photograph I really liked and I based a painting on it, changing minor details that clashed with my sense of composition. It was of a woman sitting on a chair, facing away and looking backwards at the camera. I spent a long time on it and really liked it once I was done.I showed it to a gallery owner along with some more original works and he thought it was the best of them. But he said "That woman looks familiar, who'...