Deterministic chaos. Every point precisely calculated, yet the whole is infinitely complex. A simple rule, iterated into beauty. :: The shape arises from the rule itself.

The rule doesn't know what shape it's making. It only knows the next step. The rule runs millions of times. Each step, the point moves. It never stops :: but the system has preferences. Some regions are returned to again and again. Brightness is density. The image is a portrait of what the rule loves.