Taper the NPC torso into the hips

docs/npc-visual-review.md

@@ -1,12 +1,12 @@
 # NPC visual baseline and acceptance criteria
 
 Status: baseline captured 2026-11-02. The first P1 fixes (tourist photo-prop
-visibility, backpack straps), the neck/shoulder transition and the face-depth
-pass are applied. Remaining body/clothing work is open; the baseline remains the
-reference for 0.9.4. Comparison sheets:
+visibility, backpack straps), the neck/shoulder and torso/hip transitions and
+the face-depth pass are applied. Remaining hand/clothing work is open; the
+baseline remains the reference for 0.9.4. Comparison sheets:
 [`sheet_npc_baseline_compare-p1.jpg`](blender_previews/sheet_npc_baseline_compare-p1.jpg),
 [`sheet_npc_baseline_compare-body.jpg`](blender_previews/sheet_npc_baseline_compare-body.jpg)
-and the latest [`sheet_npc_baseline_compare-face.jpg`](blender_previews/sheet_npc_baseline_compare-face.jpg).
+and the latest [`sheet_npc_baseline_compare-torso.jpg`](blender_previews/sheet_npc_baseline_compare-torso.jpg).
 
 ## What was captured
 
@@ -100,17 +100,17 @@ From `python3 tools/blender_assets.py fit` and the manifest:
 
 | Character | Tris | Verts | Head width | Clothing radius | Notable gear clearances |
 | --- | ---: | ---: | ---: | ---: | --- |
-| `npc_casual` | 3,760 | 3,556 | 0.315 m | 0.191 m (hip) | backpack x −0.041, radial −0.162 |
-| `npc_jacket` | 4,160 | 3,930 | 0.315 m | 0.191 m (hip) | lanyard x −0.116, radial +0.023 (runtime +4 cm forward) |
-| `npc_coat` | 4,754 | 4,574 | 0.315 m | 0.225 m (skirt) | sunglasses width ratio 0.641; bag x +0.037, radial −0.130 |
-| `npc_vest` | 4,272 | 4,186 | 0.315 m | 0.191 m (hip) | cap width ratio 1.067 |
-| `npc_dress` | 4,176 | 3,863 | 0.315 m | 0.260 m (skirt) | bag x +0.002, radial −0.095 |
-| `npc_hoodie` | 4,592 | 4,187 | 0.315 m | 0.190 m (hip) | — |
-| `npc_firefighter` | 4,624 | 4,487 | 0.315 m | 0.255 m (skirt) | helmet width ratio 1.651; SCBA x −0.105, radial −0.076 |
-| `npc_guard` | 4,334 | 4,456 | 0.315 m | 0.194 m (hip) | cap width ratio 1.067 |
+| `npc_casual` | 3,762 | 3,474 | 0.315 m | 0.191 m (hip) | backpack x −0.041, radial −0.162 |
+| `npc_jacket` | 4,152 | 3,900 | 0.315 m | 0.191 m (hip) | lanyard x −0.116, radial +0.023 (runtime +4 cm forward) |
+| `npc_coat` | 4,754 | 4,584 | 0.315 m | 0.225 m (skirt) | sunglasses width ratio 0.641; bag x +0.037, radial −0.130 |
+| `npc_vest` | 4,260 | 4,183 | 0.315 m | 0.191 m (hip) | cap width ratio 1.067 |
+| `npc_dress` | 4,180 | 3,863 | 0.315 m | 0.260 m (skirt) | bag x +0.002, radial −0.095 |
+| `npc_hoodie` | 4,584 | 4,294 | 0.315 m | 0.190 m (hip) | — |
+| `npc_firefighter` | 4,624 | 4,583 | 0.315 m | 0.255 m (skirt) | helmet width ratio 1.651; SCBA x −0.105, radial −0.076 |
+| `npc_guard` | 4,326 | 4,443 | 0.315 m | 0.194 m (hip) | cap width ratio 1.067 |
 
-The widest character is `npc_coat` at 4,754 triangles and 4,574 vertices, so the
-current headroom is 1,246 triangles and 426 vertices per character. Any hand or
+The widest character is `npc_coat` at 4,754 triangles and 4,584 vertices, so the
+current headroom is 1,246 triangles and 416 vertices per character. Any hand or
 clothing refinement must come out of that budget or replace existing detail. The
 refit backpack measures 380 triangles / 406 vertices.
 
@@ -188,12 +188,14 @@ The committed runs are
 [`sheet_npc_baseline_compare-p1.jpg`](blender_previews/sheet_npc_baseline_compare-p1.jpg),
 [`sheet_npc_baseline_compare-body.jpg`](blender_previews/sheet_npc_baseline_compare-body.jpg)
 and [`sheet_npc_baseline_compare-face.jpg`](blender_previews/sheet_npc_baseline_compare-face.jpg).
+The transition pass is [`sheet_npc_baseline_compare-torso.jpg`](blender_previews/sheet_npc_baseline_compare-torso.jpg).
 Keep the baseline sheet as the before artifact and add a new comparison sheet
 rather than replacing it.
 
 ## Next implementation order
 
-1. Improve the torso/hip transition and the remaining body-shape variation.
+1. Add the remaining body-shape variation between variants and re-measure the
+   LOD/impostor silhouettes.
 2. Add a conversation-distance hand/grip capture and fix hand geometry before
    judging hand items.
 3. Audit hems and footwear in walk/sit/block poses.