nx_sdfrender_sss_gate.nx

nx_sdfrender_sss_gate.nx -- THE PRE-INTEGRATED-NORMAL HALF of Penner 2011, gated. [@penner2011] /compare/graphics row: "RENDER: pre-integrated SSS bound to baked normals" -- the rung that stops the clay read. The CURVATURE half (sr_sss_preint over N.L x curvature) already shipped and is pinned by nx_sdfrender_gate's T6; this gate owns the half that binds the shader to the BAKED NORMAL MAP: each colour channel lit by its own blur of DETAIL->GEOMETRIC normal, so fine relief SCATTERS. ★2026-08-25, THE SAMPLING RUNG: the mechanism above shipped bound to the baked map's CONSTANTS while the DETAIL normal was still a procedural stand-in (mat_height through a hand-picked 10/16 gain). Its reach was MEASURED at 18 against the law's 51, so the blur was competing with a signal of a different width. sdf_shade_ray now samples the BAKED MAP'S OWN HEIGHT FIELD -- literally the same rlf_noise3 the baker calls -- and the gain is the law instead of a number. T4/T9/T10 are that rung; T3's derivation and the whole curvature half are unchanged and still pinned. WHY THESE TEETH AND NOT A PICTURE DIFF: a render diff moves for a hundred reasons. Every tooth here is a property of the arithmetic that the WRONG implementations provably cannot satisfy -- * a PLAIN BLUR softens all three channels equally -> dies at T6 (neg-control, bite-proven) * a RED TINT raises red's level, not its contrast -> dies at T1 (neg-control, bite-proven) * the PRE-RUNG shader (wrap only) -> dies at T6, which measures it AS THE CONTROL * a dialled-in constant -> dies at T3/T9 (derivation + the law's gain) * a LOOK-ALIKE field of the shader's own -> dies at T4 (the baker's field, cross-checked) * the retired 10/16 gain -> dies at T9 (neg-control, bite-proven) T5 alone is NOT sufficient and that is measured, not assumed: a uniform blur PASSES T5 (the wrap already orders the channels) and FAILS T6. T6 is the load-bearing tooth for the MECHANISM, and its bar is not a magic number -- it is the SHIPPED wrap-only path, called at runtime as the incumbent control. T10 is the load-bearing tooth for the REACH, and its bar is the RETIRED procedural path, also called at runtime. Neither bar is ever a constant. license_tier: ORIGINAL expect_exit: 0 No hw writes (Rule 26).