Document the texel/coverage/collider gates and correct the face limitation note

docs/blender-assets.md

@@ -47,6 +47,7 @@ flatpak run org.blender.Blender --background \
 python3 tools/blender_assets.py sheet   # -> docs/blender_previews/sheet_<category>.jpg
 python3 tools/blender_assets.py audit   # stdlib only; exit 1 on any issue
 python3 tools/blender_assets.py fit     # head/clothing fit + bag-body clearance, per character
+python3 tools/blender_assets.py texels  # 256² slot-map density (authored + 4× fabric), per character
 python3 tools/blender_assets.py list
 # import a GLB, apply node transforms, report geometry/bones/UVs/skinning + contract failures
 flatpak run org.blender.Blender --background \
@@ -188,12 +189,18 @@ carry baked AO and the shared neutral material maps described above.
   triangles), grounding, and an editable `.blend`. For characters it also
   checks skinning, bones, slots, the `npc_base` mesh node and the height.
 - `tools/tests/test_blender_assets.py`: catalogue and contract consistency with
-  `npc_pipeline.py`, plus a clean audit and full manifest coverage when the
-  library is built.
+  `npc_pipeline.py`, plus a clean audit, a texel-density gate (all five slots,
+  40–400 px/m authored, 250 px/m fabric floor) and full manifest coverage when
+  the library is built.
 - `src/test/tests/test_blender_assets.gd`: every asset imports as a scene
   with geometry, characters keep their bones and slots, joints match
   `npc_base`, the bones accept `NpcAvatar`'s pose composition, and props are
   grounded.
+- `tools/test_model_review.py`: every `CHARACTERS`/`GEAR`/`PROPS` entry has a
+  scorecard row and verdict in `docs/3d-model-review.md` (coverage gate).
+- `src/test/tests/test_world.gd`: every library prop that blocks walking has a
+  `StaticBody3D` + `NavigationObstacle3D`, checked against the catalogue
+  (collider/proxy gate).
 
 ## Known limitations
 
@@ -209,6 +216,8 @@ carry baked AO and the shared neutral material maps described above.
   stay neutral.
 - The 0.9.4 baseline found three P1 portrait issues. The tourist's photo prop
   now only appears in photo/film poses and the backpack straps were refit as
-  flattened chest bands; the face is still shallow/faceted at portrait range.
-  The full ranked list, measurements and before/after sheet are in
-  [`npc-visual-review.md`](npc-visual-review.md).
+  flattened chest bands. The face carries the 0.9.4 sculpt (socketed sclera,
+  chin/cheekbone, nose, lips) but its `seg=18/rings=12` head still reads
+  somewhat faceted at portrait range; a subdivision/deeper-sculpt prototype is
+  gated on the owner scorecard review. The full ranked list and measurements are
+  in [`npc-visual-review.md`](npc-visual-review.md).