Knowledge

Facts, science and history of optical illusions.
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How do optical illusions work?

Inferior and Superior Mirages, and Fata Morgana

Forced Perspective

Tree Mural

Source/credit: Liamers

This tree mural is actually the shadows of two different trees. The branches of the mural are created by the tree in the image. But the foliage comes from a tree behind the photographer. You can see its trunk on the ground.

More optical illusions:

Funny tree with a face

Stretchy Cat

Cat's face

Water drop

Canoe in the Winter

Nature

Cup Half Full

Objects