Witten-Sander (1981) — fractal growth from random walks sticking to a cluster
Cluster size: 1 particles
Max radius: 0 px
Fractal dim ≈ -
Random walkers are launched from a circle far from the seed. When a walker touches the growing cluster, it sticks. The branching fractal emerges from this simple rule.
Fractal dimension ≈ 1.71 in 2D (theoretical).