3D "Leaning tower illusion"

Draw mode:

1 tower side by side (Original)
2 towers in 3D

Eye position / viewing direction:

Look up Look down Horizontal From far
These are presets. You can also change eye/view by drag.

Tilt angle (of the tower): (3 deg)

Draw background

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The famous Leaning tower illusion. The illusion was discovered by Frederick Kingdom, Ali Yoonessi and Elena Gheorghiu. This illusoin won 1st prize in the Best Visual Illusion of the Year Contest 2007.

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Acknowledgements

• Original illusion: Frederick Kingdom, Ali Yoonessi & Elena Gheorghiu
• Texture (background), Model, Library: Three.js
• Texture (tower): http://seamlesstextures.net/