impossible-objects

Using math to make objects that look different / optical illusions

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6Distinct people

12Mentions

0Explicit recommenders

306GitHub stars

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What it is

Using math to make objects that look different / optical illusions

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Where it is used

No documented product use has been verified yet.

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This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 11:00:58 PM UTC.

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Mentions over time

HN mentions by year12 dated mentions

Observed mentions: 2018-10-26 08:16:10 UTC to 2023-12-15 18:26:12 UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

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Period	Start (UTC)	End (exclusive, UTC)	Mentions	Submissions	Comments
2018	2018-01-01 00:00:00 UTC	2019-01-01 00:00:00 UTC	2	0	2
2019	2019-01-01 00:00:00 UTC	2020-01-01 00:00:00 UTC	2	0	2
2020	2020-01-01 00:00:00 UTC	2021-01-01 00:00:00 UTC	2	0	2
2021	2021-01-01 00:00:00 UTC	2022-01-01 00:00:00 UTC	2	0	2
2022	2022-01-01 00:00:00 UTC	2023-01-01 00:00:00 UTC	2	0	2
2023	2023-01-01 00:00:00 UTC	2024-01-01 00:00:00 UTC	2	1	1

What Hacker News says

2 sources

matsemann·Aug 18, 2020

I like these. Some of them are even non-obviously impossible. They may pass at first glance, but then one sees why it shouldn't work. I recently posted my figures [0] here. It's also a kind of impossible figures, however they are actually printable in real life but still tricks the mind. [0]: https://github.com/Matsemann/impossible-objects

In Impossible Figures Library

matsemann·Jul 27, 2020

Cool, no idea how they are done. It's always fun discussing how such objects are made. I've spent some time making impossible objects as well. A different kind of impossible, where the object changes appearance based on where it's viewed from. https://github.com/Matsemann/impossible-objects

In Harry Eng, the Master of the “Impossible Bottle”