Type Alias: RingArchetype

type RingArchetype = 
  | "broad"
  | "double"
  | "narrow"
  | "dusty"
  | "triple"
  | "outer"
  | "shepherd"
  | "quadruple"
  | "skewedIn"
  | "skewedOut"
  | "dense"
  | "sparse";

Named ring-shape archetype. Each archetype maps to a fixed 8-sample radial opacity envelope in ARCHETYPE_PROFILES, which the ring shader then jitters per body for variety.