Spectre

Notice anything interesting about this polygon?

Probably not. The magic of this polygon only appears when you have many of them, and you try piecing them together. They will never produce a repeating pattern—which is wild.

This polygon is called spectre, and it was discovered in 2023 by David Smith, Joseph Myers, Craig Kaplan, and Chaim Goodman-Strauss. A friend asked if I could make the spectre tile in Twoville. The answer is that I already have.