nx_gpe_marschner_gate.nx

nx_gpe_marschner_gate.nx -- referee for hr_marschner_lobe (graphics.matrix watch contract, 2026-08-30): the NPC hair fragment path must carry the Karis-2016 closed-form Marschner R/TT/TRT lobes with melanin-derived absorption, in BOTH the emitter SOURCE (buildroot/runtime/nx_game_page_emit.nx) and the SERVED beach page (sites/nishifamily/world/beach.html). Teeth are arithmetic + byte-binding: the pheomelanin discriminator (a red-genome lock absorbs less red per melanin unit than a dark-genome lock, so its TT forward-transmission lobe is strictly brighter backlit) is proven in integer milli-units over the SAME H8 palette rows the page ships, and binding teeth pin those constants to the subject bytes so the gate's arithmetic and the shader cannot drift apart silently. DECLARED IMPRECISION, so the next reader does not trust this as exact: the discriminator and angular teeth are FORMULA-level, never pixel-level -- a rendered-pixel A/B needs a browser rig this gate does not have; what IS provable here is the formula over the shipped constants plus the byte binding of every constant to both subjects. license_tier: ORIGINAL No hw writes (Rule 26).