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Buggy3D t1_j88cldy wrote

Yeah. It was hard to explain, but the idea is to bring the picture close enough to your face that you see it in double.

You can then adjust your eyes focus and the distance from your face so as to form a central optical illusion.

Similar to when you raise one horizontal finger in front of each eye. If you bring both fingers close to each eye. You can form an optical illusion whereby the tips of each finger appear like they have merged on opposite ends of each other.

Doing the same here with the picture can let you see a 3D optical illusion of the Earth and moon, albeit unfocused.

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