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Knowledge

Facts, science and history of optical illusions.
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How to create optical illusion photos (for social media)

Is this a bird or a rabbit?

Ambiguous illusions

Rainbows are illusions

Types of Optical Illusions

Parquet Floor

parquet floor or dangerous stairs?

Source: DurkleR

This is not a wall-to-blue-wall parquet floor, but actually a very badly designed set of stairs.
Look on the sides and see the notches of the steps.

More optical illusions:

Bent over the desk

God of all Cats

Impossible woodwork

Square Fire Hydrant

Cargo in the sky

Stairs up or down?

Up or Down?

Cats

painting of the ocean

Painting of the Ocean

Clouds