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.
i think i get it….. am i first btw!!!!
So fake..
So NOT fake…
Very cool.
so dizzy
I’m sorry but it’s very obvious that it isn’t a gird rotating, but 3. The effect isn’t very good.
AWESOME!!!!!!!!!!! and seriously, I agree with ramon. Saying this is fake is like saying this is photoshopped. Also, if u fuzz out ur eyes and look at it it looks really cool too.
definitly NOT fake! I made 1 myself and it works!
At first I tought it was fake too, but cheking de GIF frame by frame, you can see it is NOT fake but incredibly awesome!!!
This is in fact a very good illusion. When looked at individually, the squares in the grid travel around the point in the very center of the picture. And because the points on the outside of the rotation move faster than the points on the inside, when looked at as a whole, our human brain breaks the picture down into several grids moving at different speeds, when in fact it is only one grid.
wow this is amazing. and it isn’t fake. notice the white flashes occasionally? that’s your eyes focusing and unfocusing.
wimps it is not fake, follow a horizontal line and you will see it never breaks.
it is very cool, open it with fireworks or somthing like. each one ite abou 50 frames to vew!!!
realy cool dude!!!
thanks!
This only works because it’s not a perfect grid with straight lines, similar to other illusions where you think it’s a spiral when in fact it’s made of circles…not a fake but cleaver way of manipulating the lines to change what you see
The lines are straight. Save the image and take a single frame. Better yet, take the entire gif and view it frame by frame, cause this optical illusion has you definatly worked on you fool.
Very nice.
Some kind of aliasing seems to appear. So I think that when the rotation speed is decreased, the effect will disappear /move away from the center of the image.
these are always great to look at however its been done 1000x before, not really anything new >.<
the guy "david Oreilly" whos claiming to town these is just ripping off somebodys elses work
Yeah if you look at it while crossing your eyes like looking at one of those magic 3D pics, you can really see that it is only one grid rotating, especially for slow rotation, without opening it in a new tab or window. Neat! And when you do open it in a new tab in Firefox, you can see a miniature low quality version of it on the tab and in the address bar. I don’t know about anyone else, but I found that rather oddly interesting.
When I first viewed this clip I thought, “What is the optical illusion?” Only after reading that it was in fact a single rotating grid did I realize how awesome it was.
You should include the checkered grid for a reference.
Why do so many people come up with such ridiculous ideas about this being a fake? It would be harder to fake it than a real illusion in this case. They must think that their senses are totally infallible.
With lots of concentration, I can see that it’s just a single grid. Looks pretty cool…
I get REALLY tired of the “it’s fake”, “it’s crap” comments. I really like this site. If you sit on the computer all day making comparisons, yea, maybe it’s mediocre at best to some of you but if you want to have any fun in life-stop the negative criticism and look at it as if you have never seen it before. That’s why little kids have more fun than most adults. They are open-minded and imaginative. (and don’t mind getting dizzy)
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…
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.
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.
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.
I think im gonna throw up…
IT REALLY IS ONE PERFECT GRID SPINNING!!!!!!!
I dont get it…….
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?
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.
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
its fake its a png/gif image wanna proof…..just same any 1 i mage and see its format or notuce carefully
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.
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.
PLEASE THATS BORING!
The first one its rotating around a triangle. And then a Square. Not sure
It made my leg twitch. :o
I dont get it