This is old enough that the year (2017) should be in the title.<p>Also, the optical illusion isn't really 3d since it relies on a single point perspective - it'll show up on camera, but if you see it with two eyes you'll see the actual structure.<p>Now for a real 3d optical illusion, look at the hollow face illusion - not on video - find a real life instance of a depth reversed face.<p>Your brain has circuitry specifically optimised for facial recognition, and what you're seeing so confuses your mind that it breaks depth perception.<p>It will actually appear as if a static object is turning to follow you around the room.