Lane C measured the bookshelf's transmission halving interior draws (opshop/hall 191->104, book/hall
101->51, dept/hall 116->116 control). The cause, with vendored line numbers: three.module.js:16209
enters renderTransmissionPass(opaqueObjects, ...) whenever currentRenderList.transmissive is
non-empty, and :16433 re-renders the WHOLE OPAQUE LIST into a render target — every opaque draw
issued twice. Trigger is material.transmission > 0 (:6890), set from the glTF at GLTFLoader:1202.
And at 1.0 it is not 'a bit glassy': :494 does totalDiffuse = mix(totalDiffuse, transmitted.rgb,
material.transmission) — the diffuse term is REPLACED by the backdrop.
I SCANNED ALL 103 GLBs. Three carried it:
procity_fit_bookshelf_01 mtl_10218_Bookshelves_v1 shipped and hurting (C's)
procity_street_longbench_01 lambert3SG NOT WIRED — the 5.86 m arcade bench
the v9 charter names, on my R38
recommend list for Lane B
procity_street_streetlight_01 Streetlight_HighResSG3 NOT WIRED — one per ~18 m of street
The two unwired ones are the worse finding: the street budget is 292/300 with EIGHT draws of margin,
and a pre-pass there costs another ~292, not eight. Armed, not fired.
FIXED SURGICALLY. pipeline/strip_transmission.py rewrites only the JSON chunk and copies BIN through,
printing sha1(BIN) before and after: BIN IDENTICAL on all three, tris/dims/mtl/img/tex unchanged.
KHR_materials_ior deliberately left (ior does not trigger the pre-pass).
PUBLISHED + VERIFIED under John's R22 standing authorization via the passwordless tailnet ingress:
6/6 HTTP 200 off the PUBLIC depot, byte counts exact, sha1 identical, depot copies re-scanned clean.
_published.json 56 -> 59.
GATED, which matters more than the fix: validate_manifest.py now HARD FAILS on transmissionFactor>0
with the three.js line numbers and the fix command in the message; glb_stat.py grew a transmission
column and a loud footer. Nobody looked for three epochs because a bookshelf is obviously not glass.
ALSO: the arcade's three meshes, published and catalogued the same round they were generated —
aframe_board 366 tris (<=16 inst), blade_sign 299 (17 inst), keycutter_sign 498 (1 inst). manifest
furniture 13->16, GLBs 36->39, validate 0 errors 0 warnings. blade_sign ships FLAGGED: its back face
carries TRELLIS-hallucinated art where the concept had no data, which is one more reason the
+0-draw perpendicular-quad answer is the recommendation and this GLB is the fallback.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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