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I recently had fun implementing [0] some of the concepts/math for ambiguous cylinders by Kokichi Sugihara. Some of his first illusions [1] came from researching

I recently had fun implementing [0] some of the concepts/math for ambiguous cylinders by Kokichi Sugihara. Some of his first illusions [1] came from researching computer vision, where the computer should understand how a 2d picture supposedly looked in 3d. When feeding it some optical illusions, he realised it would be possible to make these objects in real life! [0]: https://github.com/Matsemann/impossible-objects https://github.com/Matsemann/impossible-objects [1]: http://www.isc.meiji.ac.jp/~kokichis/anomalousobjects/anomalousobjectse.html http://www.isc.meiji.ac.jp/~kokichis/anomalousobjects/anomal...

acqq 8y ago
Wow, the best illusions I’ve seen for a while! Thanks!
- maaaats 8y ago
  Sugihara just recently (again) won the Illusion of the Year contest. He has made lots of fun stuff over the years that's worth checking out! [2] I was lucky to attend "FUN with Algorithms 2018" earlier this year, where he was one of the invited speakers. Seeing the illusions IRL blew my mind and I had to make them myself. [2]: http://www.isc.meiji.ac.jp/~kokichis/Welcomee.html http://www.isc.meiji.ac.jp/~kokichis/Welcomee.html
  - wolfhumble 8y ago
    Video of the 'Best Illusion of the Year Contest - 2018': https://www.youtube.com/watch?v=iA5zBZB2dng https://www.youtube.com/watch?v=iA5zBZB2dng Should be watched for just the music itself! ;-)
andrewla 8y ago
The direct links to the stl files in github let you rotate it around and get some idea of how they actually work [1][2]. This is absolutely mind-blowing! [1] https://github.com/Matsemann/impossible-objects/blob/master/3dfiles/arrow/filledarrow_whole.stl https://github.com/Matsemann/impossible-objects/blob/master/... [2] https://github.com/Matsemann/impossible-objects/blob/master/3dfiles/circlesquare/circleinnersquare_2x2.stl https://github.com/Matsemann/impossible-objects/blob/master/...
- singularity2001 8y ago
  I don't get the first one but squaring the circle is cool

acqq 8y ago

Wow, the best illusions I’ve seen for a while! Thanks!

maaaats 8y ago
Sugihara just recently (again) won the Illusion of the Year contest. He has made lots of fun stuff over the years that's worth checking out! [2] I was lucky to attend "FUN with Algorithms 2018" earlier this year, where he was one of the invited speakers. Seeing the illusions IRL blew my mind and I had to make them myself. [2]: http://www.isc.meiji.ac.jp/~kokichis/Welcomee.html http://www.isc.meiji.ac.jp/~kokichis/Welcomee.html
- wolfhumble 8y ago
  Video of the 'Best Illusion of the Year Contest - 2018': https://www.youtube.com/watch?v=iA5zBZB2dng https://www.youtube.com/watch?v=iA5zBZB2dng Should be watched for just the music itself! ;-)

andrewla 8y ago

The direct links to the stl files in github let you rotate it around and get some idea of how they actually work [1][2]. This is absolutely mind-blowing! [1] https://github.com/Matsemann/impossible-objects/blob/master/3dfiles/arrow/filledarrow_whole.stl https://github.com/Matsemann/impossible-objects/blob/master/... [2] https://github.com/Matsemann/impossible-objects/blob/master/3dfiles/circlesquare/circleinnersquare_2x2.stl https://github.com/Matsemann/impossible-objects/blob/master/...

singularity2001 8y ago
I don't get the first one but squaring the circle is cool