nx_faceanat_gate.nx

nx_faceanat_gate.nx -- prove the INSIDE-OUT face (nx_faceanat: canon proportions + tissue-depth relief) is a principled, MEASURED improvement over the eyeballed sdf_face -- the operator's "skeleton->muscle->skin" call, tested not asserted. T1 CANON proportions hold in the EMITTED parts (rule of fifths: eye centers +-258 symmetric on the eye line; thirds: brow->subnasale and subnasale->chin within the anthropometric band) T2 TISSUE-DEPTH relief is real: the cheekbone (proud ~10mm) sits FORWARD (-z) of the forehead (shallow ~4.5mm) and FORWARD of the recessed temple -- differential relief DERIVED from the depth table, not sculpted flat T3 ★THE FIT TEST: rs_err (render-vs-reference luma over mapped correspondences) of the anatomical face must be COMPARABLE-OR-BETTER than the hand-tuned sdf_face -- inside-out derivation is not worse than eyeballing T4 determinism + PNG knowledge/nx_faceanat.png license_tier: ORIGINAL expect_exit: 0