A racing game from 2014 now looks so real that people are watching clips of it and swearing it's actual Formula 1 footage. Fans pulled it off without any help from the studio that made it, using an AI that leaked out of a basketball game. The game is Assetto Corsa. A small Italian studio called Kunos put it out 12 years ago, and the whole company sold for €4.3 million in 2017. The AI is DLSS 5, Nvidia's new tech that repaints the lighting and surfaces of every frame in real time so games look…