Optical illusions.

[Tawmis]

More can be found here.

Edit - For the animated GIFs (5 and 6) you need to click on them to make them animated. They don't appear animated in the preview.

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[DeadPoolX]

None of those worked for me. I think my glasses tend to eliminate the effects of optical illusions. I'm sure it's my prescription (which is incredibly high) more than anything.

[gumby]

I love the 'tessellated tiles'. That reminds me of the 'tumbling elves?' that Escher did...

[Tawmis]

None of those worked for me. I think my glasses tend to eliminate the effects of optical illusions. I'm sure it's my prescription (which is incredibly high) more than anything.

Okay, I can get the staring ones... but what about the pencils?
Count the tips of the pencil, then count the erasers.

[Collector]

Okay, I can get the staring ones... but what about the pencils?
Count the tips of the pencil, then count the erasers.

That is just a variation of this old one:

[DeadPoolX]

None of those worked for me. I think my glasses tend to eliminate the effects of optical illusions. I'm sure it's my prescription (which is incredibly high) more than anything.

Okay, I can get the staring ones... but what about the pencils?
Count the tips of the pencil, then count the erasers.

Yeah, I got that one. I guess I shouldn't have said "none."

[gumby]

Okay, I can get the staring ones... but what about the pencils?
Count the tips of the pencil, then count the erasers.

That is just a variation of this old one:

That is the first one that got me started on Escher. I drew variations on this over and over...

[Collector]

Okay, I can get the staring ones... but what about the pencils?
Count the tips of the pencil, then count the erasers.

That is just a variation of this old one:

That is the first one that got me started on Escher. I drew variations on this over and over...

Me too.

[BBP]

I'll be very old before I tire of this optical illusion:
http://www.youtube.com/watch?v=7knnO4vKgXg

[AndreaDraco]

I made only one star (top left) disappear

[gumby]

I'll be very old before I tire of this optical illusion:
http://www.youtube.com/watch?v=7knnO4vKgXg

That one is great. I even found myself questioning if it was a fake, but was able to get the photo to switch back to black-and-white and again to 'full' color. Nice.

[Tawmis]

Is the Cowboy riding TOWARDS or AWAY?

Can you find the man?

negativespace.jpg (36.55 KiB) Viewed 1998 times

Believe it or not, this isn't a Photoshop job. This surreal building actually exists at 39 Avenue George V, Paris.

[BBP]

Note to self: visit Paris!

[AndreaDraco]

Actually, that's a hoarding used to cover the construction site below it. I've seen it when I visited Paris four years ago so I guess it's pretty safe to believe that it is gone now and that the real palce can be seen again