Very cool, thank you for sharing. I think there is a bug. You do: Math.cos((theta / crclCnt) * noiseFreq) when crclCnt = 0 in the first iteration of the loop. I think you want to start the loop at crclCnt = 1.

nice catch! Thanks for pointing that out!

:) No problem. Welcome back to Observable!

Looks like a couple of package updates broke your notebook. :( Pinning to "simplex-noise@2.4" should fix it.