Metamere,
@Metamere@genart.social avatar

For the topic of "Impossible objects (undecided geometry)", I just had to add to my collection. I made an interactive version of Reutersvärd's Triangle. It's the original (and my favorite) version of the later discovered and more widely known Penrose Triangle.

Try it out here:
https://openprocessing.org/sketch/1941150

a differently colored version
The default, greyscale version of the illusion. I like how the negative space forms the star of David in the middle.
Here with things looking a bit flatter, and with the triangles used to reverse the overlap outlined, the method of constructing the illusion is revealed.

Metamere,
@Metamere@genart.social avatar

And here is simultaneous control of the size and color.

video/mp4

Metamere,
@Metamere@genart.social avatar

I made a couple videos to demonstrate the interactive nature of the illusion. Here is the basic size control of the "cubes".

video/mp4

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