You have probably already seen a plenty of stories about optical illusion paintings painted in streets by different artists. Well this one is a little bit different. It is a story about the artist who mixed his artistic skills with some math calculations to create amazingly realistic illusion paintings. It is enough to tell that the guy who painted those optical illusion paintings, Kurt Wehner, is a former member of NASA and he uses his mathematical skills to make almost perfect illusion paintings on streets. If they are observed from a specific angle, those paintings will make you believe they are actually real. Here you can see some photos of his best artworks.