nx_gx6_tonemap_gate.nx

nx_gx6_tonemap_gate.nx -- seq260 EAT-BY-BUILD: a real fixed-point TONEMAP replaces the hard 255 clamp. MEASURED defect: 50.4 percent of a real game frame (Gx-4 walk tick5, 99090/196608 px) clamped to pure 255,255,255 -- every bright surface went FLAT, all material detail in highlights destroyed. A blown-out surface scores WORSE than a dim one with any detail-scoring critic, so this capped human_fidelity directly. sg_tonemap = extended Reinhard out = x(1+x/W^2)/(1+x) with an explicit white point. The point is not that pixels get darker -- it is that DISTINCT RADIANCES STAY DISTINCT. This gate proves exactly that, at the function level (against a simulated old clamp) and on a real bright render. license_tier: ORIGINAL expect_exit: 0