David Szakaly

This GIF — and a number of others — was done by Hungarian animator David Szakaly.
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Bill Tavis

Bill Tavis is another awesome GIF animator on Tumblr.
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Rotating snakes

This illusion — of the type called “illusory motion” — is not moving. It’s by Japanese professor of psychology Akiyoshi Kitaoka.
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Davidope

David Szakaly goes by the name Davidope and does a ton of awesome, trippy GIFs on his Tumblr blog.
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Non-animated Tim Burton socks

I’m pretty sure these aren’t actually called Tim Burton socks, but I’m going to start calling them that now.
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Davidope

Szakaly got his start messing around with vector animations and now uses Tumblr as a platform to play with his experimental GIFs.
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Merriweather Post Pavilion

This image was famously used by the band Animal Collective for the cover of their 2009 album Merriweather Post Pavilion and is based on the work of Akiyoshi Kitaoka. It was created by Robert Carmichael.
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Davidope

It took Szakaly six tries to perfect this GIF. (via)

Rubik’s cube

This is called an “anamorphic illusion.” There’s a full video of them here.
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Davidope

Szakaly mostly works in the corporate world but has been experimenting on the side with these animations for 15 years.
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Floating cube

Catch the whole video here. Check out other optical illusions from YouTube channel Brusspup here.
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Bill Tavis

Called “Eye See Julia,” this is another excellent GIF by Bill Tavis.
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Not moving

This is not moving. I promise.
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Stare at the cross

The pink dots will disappear.
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The never-ending drop

It’ll get to the bottom soon, I promise.
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The afterimage

One type of optical illusion is called the “afterimage,” and you’ve seen them before: You stare at a thing for a minute or two, then look away, and you see something burned into your eyes. This one is particularly crazy. Stare at it for a minute, then look away.
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The rotating pyramid

This awesome performance by the Carolina Crown Drum and Bugle Corps should set a new standard for drum lines.
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Instructions

Follow the instructions. And then after doing it, don’t follow them. The picture is in black and white.
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The forced-perspective room

This is a common movie trick and was frequently used in the Lord of the Rings series.
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Davidope worms

Another one of my favorites from Davidope.
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