diffusion limited aggregation

some algorithms have an attraction. beyond the straightforward utility of providing a measurable solution to a highly defined problem, some of them are satisfying analogs of natural processes, or seem promising windows on the mechanics of reality. I’m not sure how to categorize them, but there’s also a class of algorithms that have a particularly visual satisfaction, that explain some process and provide an intuition, that intuition being not a new thing, but the alignment of something previously recognized, falling into place.