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⚠️ Important | Libfredo 15.6b introduces important bugfixes for Fredo's Extensions Update
Circles <> Squares
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A little Sketchup project for someone
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If you watch closely and/or freeze the motion as he rotates the shapes, you can see that the illusion relies on a combination of curves in the vertical sides and also in the top edges. Your eyes and brain are determined to interpret them as a planar array, so when they line up just so it takes them as either circles or squares. The math to make this work is beyond me, but that's the theory.
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very interesting illusion...
john
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