Comments on: Rotating Grid Optical Illusion

By: Bunnasaur

Bunnasaur — Sun, 17 Jul 2011 20:47:25 +0000

The first one its rotating around a triangle. And then a Square. Not sure

By: Tess

Tess — Wed, 19 Jan 2011 18:20:08 +0000

PLEASE THATS BORING!

By: Anonymous

Anonymous — Mon, 29 Nov 2010 03:00:10 +0000

For any of you who think it’s “fake”…

Pick a square. Any square. Then follow it. You will find that they all go in one large circle, not independently as several.

By: Ray (Rachel)

Ray (Rachel) — Fri, 19 Nov 2010 16:33:20 +0000

Am I the only one who this illusion does not work on? I automatically saw it as one rotating grid. If I focus real hard, I can kind of see it as individual grids rotating. I guess my visual perception is just weird.

By: Abhishek

Abhishek — Sat, 01 May 2010 09:03:02 +0000

its fake its a png/gif image wanna proof…..just same any 1 i mage and see its format or notuce carefully

By: fakey

fakey — Wed, 24 Feb 2010 10:42:17 +0000

actually it is fake… its not 5+ separate spinning grids (supposed illusion) nor is it 1 big grid (what it claims).
frame 43 frozen (below) clearly shows a 2nd static grid offset slightly that fades in from black and back out again:
http://img8.imageshack.us/img8/4407/image0kf.jpg

By: emil

emil — Sun, 24 Jan 2010 01:08:11 +0000

This isn’t fake and it doesn’t make sense saying this is fake. this is a framerate illusion and it works. That’s a fact.

By: Schneek

Schneek — Fri, 13 Nov 2009 05:54:10 +0000

Its not one grid, you suckers. Even if our eyes suffered from this optical illusion (which it doesn’t!), it’s a mathematical fact that it could be faked using multiple grids with the rotations timed so that you will not see any breaks. And that’s what this is – an apparent fake! And that’s why it doesn’t work with a checkered pattern – because blacks will neighbor blacks for every other timestep, or else the timestep needs to be doubled to prevent this. Are all the other comments just David under an alias. You can’t all be that dumb?

By: The Lion king kid

The Lion king kid — Fri, 26 Jun 2009 19:47:26 +0000

I dont get it…….

By: maijagirl

maijagirl — Sat, 07 Feb 2009 22:16:00 +0000

IT REALLY IS ONE PERFECT GRID SPINNING!!!!!!!

By: Anonymous

Anonymous — Thu, 05 Feb 2009 07:51:00 +0000

I think im gonna throw up…

By: David

David — Wed, 03 Sep 2008 08:39:00 +0000

Just to back up my point, if you take a grid on a piece of card (stick some graph paper to a cereal packet, stick a pencil to the back and spin it around you will not see this effect because you have eliminated the video display which works in individual frames and you’re now yousing just your eyes which see constant changes, not descreet frames.

By: David

David — Wed, 03 Sep 2008 08:34:00 +0000

What we’re seeing here is a good example or aliasing. It’s an artefact of video displays. Because the video scrre works by showing you a series of images, you can get an effect similar to looking at a rotating car wheel on TV as the wheel changes speed sometimes you see the wheel turn slower or backwards. This is because the camera is not showing enough frames per second to show the wheel in several different positions in one rotation and what you actually see is the wheel in a similar position but from the next rotation of the wheel. For example the wheel may turn 350degrees of a rotation before the camera takes the next picture, this will give the impression that the wheel has turned 10degrees backwards. To apply this principle to this illusion, the rotation you see near the edges is because the distance that the crosses move between frames of the picture is greater than the distance between the crosses, so the effect is similar to the car wheel example above. Your eye links the series of pictures together and assumes that a cross in one frame is now the cross closest to it’s previous position in the next frame, not the cross quite a distance around. If you colour a spot on the grid before you render your animation you will see that from one frame to the next, alough the cross you marked has moved a long way, if you draw a line from its previous position to the next closest cross you will see that is is moving in a different direction. If you did this for every cross, you will see which direction the different areas will appear to move.

By: Anonymous

Anonymous — Wed, 03 Sep 2008 02:41:00 +0000

If you think about it carefully, the rotational speed is only changed by the size of the step between frames and how quickly the frames are displayed. As the eye and brain percieve each area and summs up the changes in each localized area, for each step size, some appear to have only moved or rotated a little. Escher would have loved this local consistency. Each step size changes the locus of minimum change. Play the frames faster or slow, but keep the step size.

By: Badslats

Badslats — Tue, 02 Sep 2008 23:54:00 +0000

It took me a while but I think it’s not fake, the illusion is just that good…

Long ago it was such a nice one…