A black and white octagonal pattern warped into a spiral.
https://mastodon.r-flash.eu/system/media_attachments/files/111/446/726/792/780/961/original/ecf347ea0ca018fc.png
I ran into an interesting class of patterns a while ago. I managed to distill the algorithm to just a bunch of operations since then. These are polygonal SDFs run through fBm, a periodic function, and fBm again.
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