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

Ghostrider

Source/credit: Skilax06md

This ghostrider is nothing more than a confusing shadow. Our brains fill in the rest.
The bike seat’s shadow forms the head and hair of the figure, and the wheel is casting the shadow for the figure’s torso and legs, and the shadow arm is from the seat post.