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Knowledge Cats Dirty Minds
Food Mirrors Floors

Knowledge

Facts, science and history of optical illusions.
See all the articles or scroll down to see what you came for.

Squirrel Stereogram

Stereograms

Billie Eilish drawn in 3D by Stephan Pabst

Anamorphic optical illusions

The Dress blue black white gold

Color Constancy Illusions

Square shadow

Tree with square shadow

In this picture it looks like the tree has a square shadow. But in reality the light is coming from a side angle and not above. The square shadow is not cast by the tree.

More optical illusions:

Mind-boggling Floor
Smile!
Lake View Garden
Sand Bear
Dog Head Mount
Big Dog
Strained Expression
Floating cat head
  • Pareidolia
  • Physical illusions
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Coffee sign

Coffee

Shadows

sunken police car

Sunken police car

Cars