You ask "how is this computer-generated car outline an optical illusion"? Well, to your surprise, it isn't computer generated - it's real life sculpture, created by British artist Benedict Radcliffe. I got these 3 photos from a reader called Zafar Iqbal, who "just had to submit this". Zafar also added that the sculpture "looks amazing and so non-real". I agree. It's like those 3D street lines, everyone thought were also created by a computer. I think these are magnificent (two more photos inside the post). I like "installation" optical illusions very much, and try to post them as often I can. Many of those are really original, but some are also very abstract. Be sure to check other installation optical illusion in my archives. Enjoy!