Try to say the color and not the word.
At first it looks like this is just some video editing but then you see that it actually is an optical illusion.
A popular illusion done in a 3D model. Very Cool. Try it yourself.
Just by passing an object with see through lines over these drawings they come to life before your very eyes.
This one is for you builders out there. Can this structure be built?
Stare at the center long enough and the dots will disappear!
Take this visual test. I bet you do!
KST saw a hump. How about you?
Another illusion to make your eyes bug out of your head. The square moves!