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  #151  
Old 02-23-2019, 11:34 AM
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Default Re: Optical illusions

Andrew Lipson made a whole series of 'impossible' Lego builds.

Here's one example - a Lego version of Escher's Ascending and Descending





...and how he did it.

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  #152  
Old 03-04-2019, 10:24 PM
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  #153  
Old 03-09-2019, 02:09 PM
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Default Re: Optical illusions

Some people can't see the upside-down plates. This one might work for them - it's the same uncropped image rotated ninety degrees both ways.

People are used to illumination coming from above - not from below; so when the scene is illuminated from below, one's brain is inclined to flip the image inside-out to make it better match with the 'usual' illumination.

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