Record the rejected prototype shirt-shell experiment

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,