looks

Eight sprite materials, each a hand-written WGSL shader for one look: puff, flame, spark, glow, ember, mote, droplet, ring.

They are the baseline. Every one is a bespoke shader on a flat quad, authored per look, and that form has a ceiling well below simulated or captured imagery: a flame here is noise shaped on a card, where a real one is a simulation rendered or baked. An effect built from generic parts (a solver, fields, a draw with a world's own material, a baked simulation) is judged against these and is expected to beat them.

A world draws with its own materials. These are usable through material = like any other, and nothing requires them.