exhaust

Instances (soft camera-facing cards) for the eggplant car's twin exhausts, in the car's own space: two streams of magenta flame streaks with a white-gold core leaving the tips at x = +-0.35 backwards along +Z, scaled by boost, and a thin stream of violet smoke puffs scaled by throttle. Three GPU particle solvers (flame 64, core 48, puffs 32 at most); outputs flames, cores and puffs.