Rocky

Surfaces extracted by surface nets, after Gibson (1998). Sphere tracing and the Lipschitz bound on a distance field after Hart (1996) — the bound the brick culling rests on. Distance-field operators and the smooth minimum after Íñigo Quílez.

Value noise after Perlin (1985). Cellular noise after Worley (1996). Curl noise after Bridson, Hourihan & Nordenstam (2007). Alligator noise after the smooth-minimum kernel sum described by Olano. Grids read back with Catmull–Rom splines (1974).

Weathering as curvature flow on level sets — Osher & Sethian (1988) — kept a distance field by the reinitialisation of Sussman, Smereka & Osher (1994). Tumbling after Bloore's abrasion equation (1977) and the study of pebble shape by Domokos & Gibbons (2012). Load lock after the stress-controlled erosion of Bruthans et al. (2014).

Remeshing by quadric-error simplification, after Garland & Heckbert (1997), in meshoptimizer by Arseny Kapoulkine. UVs unwrapped by xatlas, Jonathan Young's reworking of Ignacio Castaño's thekla_atlas, built for the web as xatlas.js by Palash Bansal; its charts are flattened by least-squares conformal maps after Lévy et al. (2002).

Algorithms are not copyrightable; they are credited because the people who published them made this possible. The libraries are MIT and Apache 2.0 — their licences.