Knowledge

Facts, science and history of optical illusions.
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Billie Eilish drawn in 3D by Stephan Pabst

Anamorphic optical illusions

Forced Perspective

How to create optical illusion photos (for social media)

Dogs sharing a mouth

Source/credit: BeanzMeanzBranston

These two good boys seems to blend. With the same fur it is hard to distinguish where one dog ends and the other begins. But this is the solution to this optical illusion:

Two dogs optical illusion solution — Imgur

More optical illusions:

Aerial View of a Beach

Garnier for all hair types

Flying Dutchman

Trail Runner Going into the Woods

Escher drawing IRL

Cars

Beautiful Caterpillar

Birds