still_metal

Tarnished brass and blackened iron for the eight-plate still.

A value-noise grain settles verdigris into the upward faces and the grain lows; a second, vertically stretched field keeps a polished streak where a hand or a solvent has kept the metal bright. perforation punches a sieve field through near-horizontal faces only, which is what turns one flat deck mesh into a distillation tray without a second shader. emissive_strength is the fixture's own light, and per-instance lane 0 adds pulse_gain on top of it, so one material serves eight risers each at its own brightness.