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This Optical Illusion Tricks Your Brain With Lego And M&Ms

Illustration for article titled This Optical Illusion Tricks Your Brain With Lego And MMs

Created by Mary Coffelt and her colleagues at the Barrow Neurological Institute, this version of Akiyoshi Kitaoka's "Bulge" illusion uses strategically placed white and purple M&Ms to warp your perception of a checkerboard built from legos of the same color. (Hit the jump to see a video of the Bulge illusion in action.)

[SciAm bwo Boing Boing]

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DISCUSSION

hendrichattila
Hendrich Attila

Okay, I see the illusion, I see what patterns one must add to create the illusion, but I don't get the reason behind the illusion. Why does our brain process flat, simmetric checkboard patern with diagonal lines of dots as a spherical bulge?