David O’Reilly, the author of iHologram app (fake), has released this new optical illusion that made big stir around the web. While working in 3D last year, he discovered this animated illusion. He came to conclusion that a large grid seen rotating at a certain speed will appear to group itself into smaller grids, spinning independently. In this example, we see a central grid, and 3 or 4 orbiting it. Here appear about 5 or 6 grids. The same animation at a lower frame-rate looks almost liquid. It appears the persistence of vision effect overrides our knowledge that this is a single grid and divides it up optically. This only seems to work on an uniform grid, while brick formation has slight different but still interesting results. Unfortunately, the effect is lost when using a checkered texture. I have attached 3 of David’s animations, but you should open them in new window, in full-size to get the best effect.
