This is a "crystal" I generated using a DLA algorithm implemented in Processing.

I first saw a generative crystal back in early ninties. Sam and I had come across a collection of fractal programs written in C.

I can remember spending hours trying to figure out how the crystal grew. Since then I’ve tried coding generative crystals a number of times and have always failed.

Yesterday I came across an article on Diffusion-limited aggregation in a Demoscene zine, and everything “crystalized.”

An interactive model is forthcoming.