Hallu

The orange stripes go through the “green” spiral but not the “blue” one. So without us even knowing it, our brains compare that spiral to the orange stripes, forcing it to think the spiral is green. The magenta stripes make the other part of the spiral look blue, even though they are exactly the same color.

via TED Blog: Amazing illusion.

Astrofra, François Gutherz

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François Gutherz is french 3d artist. astrofra.com