Record the rejected prototype shirt-shell experiment

MEMORY.md

@@ -48,11 +48,13 @@ canonical implemented-features list in `docs/development-status.md`.
   rounded shell; laces were dropped for triangle budget. The neck skin rule needed a `z > 1.35`
   guard: without it the `radius < 0.08` test painted skin at the crotch. Lowering the hem to
   z 0.80 (unitard), tilting it up at the front (high-cut swimwear) and a 13% hem flare (peplum)
-  were all rejected; the remaining crotch V is the dark hollow under a body-painted shirt, and a
+  were all rejected; the remaining crotch V is the dark hollow under a body-painted shirt. A quick
-  separate loose shirt shell is the real fix. Remaining polish: crotch V, partly loosened shirt,
+  open, flared solidified tube (0.150→0.196 m, z 1.05→0.80, 24 segments, ~288 tris) also failed:
+  it read as a hanging apron/tabard. The real fix is a shaped shirt shell with armholes and a
+  curved hem, not a tube. Remaining polish: crotch V, partly loosened shirt,
   angular thigh facets. The prototype uses flat slot colours because the one-shot MPFB UV unwrap
   does not match the per-slot NPC atlases. Renders:
-  `tmp/npc-parts/mpfb_proto/renders82/`; body-only: `body_only.glb`.
+  `tmp/npc-parts/mpfb_proto/renders84/`; body-only: `body_only.glb`.
 - **Project agent skills (2026-11-03):** two tracked skills live in `.agents/skills/`:
   `gig-line-blender-asset-contract` and `gig-line-release-qa`. They are guidance only,
   add no runtime dependency and are referenced from `tools/README.md`. The third-party

TODO.md

@@ -234,13 +234,15 @@ owner reviews the silhouette and a production integration decision is recorded.
 - [x] Reject three cheap hem fixes: lowering the shirt to z 0.80 turns it into a unitard; tilting
       the hem up at the front reads as high-cut swimwear; a 13% hem flare reads as a peplum.
       The remaining V is the dark crotch hollow under a body-painted shirt, not a slot bug.
-- [ ] Owner reviews the updated MPFB body renders (`tmp/npc-parts/mpfb_proto/renders82/`).
+- [ ] Owner reviews the updated MPFB body renders (`tmp/npc-parts/mpfb_proto/renders84/`).
       Remaining known defects: the crotch hollow still reads as a V under the shirt hem, the
       shirt is only partly loosened by the 12% torso inflation, and the 2k-tri body budget leaves
       some angular thigh facets. A separate loose shirt shell is the proper fix for the first
       two; these are polish, not blockers for the body direction.
-- [ ] Build a separate loose shirt shell (open hem, shaped to the hips) instead of body-painted
+- [ ] Build a proper loose shirt shell instead of body-painted cloth. The quick open, flared
-      cloth. It must fit in the 683 spare triangles or come with a head/body triangle rebalance.
+      solidified tube (0.150→0.196 m, z 1.05→0.80, 24 segments, ~288 tris) read as a hanging
+      apron/tabard and was rejected. The shell needs a shaped torso, armholes and a curved hem,
+      not a tube. It must fit in the 683 spare triangles or come with a head/body rebalance.
 - [ ] Rebalance the triangle budget before rollout: 683 spare is below the ~1,200 the firefighter
       and hoodie variants need. Protect the head budget first; do not lower the accepted face.
 - [ ] Fix the low-budget seams before any rollout: weld the torso/hip/arm components after the

docs/npc-model-sourcing.md

@@ -65,7 +65,9 @@ light smoothing pass softens the closed thigh/hip region. The neck skin test is
 1.35 so it cannot paint the crotch. Remaining polish: the crotch hollow still reads as a V under
 the shirt hem, a partly loosened shirt and angular thigh facets; a separate loose shirt shell is
 the fix. Lowering the hem to z 0.80, tilting it up at the front and a 13% hem flare were rejected
-as a unitard, high-cut swimwear and a peplum respectively.
+as a unitard, high-cut swimwear and a peplum respectively. A quick open, flared solidified tube
+(0.150→0.196 m, z 1.05→0.80, 24 segments) read as a hanging apron/tabard; the shell needs a shaped
+torso, armholes and a curved hem.
 A torus collar, cloth cylinder collar, skin neck-blend sphere, destructive vertex-smoothing pass
 and untucked shirt-hem band were tried and removed because they read as a brace, shelf, donut or
 hanging flap, or tore a hole at the collar. Protruding flat sole plates read as skates or bricks,