Light on an Impossible Object

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The "impossible triangle" of Oscar Reutersvärd is constructed as a three‐dimensional object. Move the light source and modify the opacity to understand the construction. If you do not understand, move the object!

Contributed by: Bernard Vuilleumier (March 2011)
Open content licensed under CC BY-NC-SA



Swedish artist Oscar Reutersvärd is the "father of impossible figures". He was the first to deliberately make impossible figures.

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