Spinning Grids

El Pirata · #1 (**permalink**) 09-22-2008, 04:28 AM

http://www.davidoreilly.com/2008/07/...-grid-illusion

watch and be amazed.

**SARS-expl0ted** · 09-22-2008, 06:21 AM

Um...I don't think you linked us to the correct thing.

El Pirata · 09-22-2008, 11:37 AM

Its just one grid spinning that looks like lots of them are spinning, its suppose to be an optical illusion

from the link

Quote:

While working in 3d last year I discovered this optical illusion.

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 there appear to be about 5 or 6 grids:

at a lower frame-rate it looks almost like 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 a uniform grid (I also had interesting results with a brick formation), but the effect is lost when using a checkered texture.

**SARS-expl0ted** · 09-22-2008, 11:38 AM

Oh. The link works now.