screenshots: adopt stable-named shots (belong on main, off gameplay branch)

The stable-named screenshot set (renamed in the NPC/character work) is
review content that does not belong on the gameplay-crossing branch. Bring it
onto main directly:

- renames all 9 numbered review shots to stable camera names
  (review-overview, review-character, ... review-hero-facade-oblique)
- adds the download-north-buildings demo shot + review-npc-prefab
- README updated for stable naming and the new NPC shot

Screenshots/README.md

@@ -27,19 +27,24 @@ and exits — about a minute. The camera list lives in
 
 ## Review-map shots
 
-All ☑ approved 2026-11-07 unless noted. Click an image for the full-size PNG.
+All ☑ approved 2026-11-07 unless noted. `review-npc-prefab` is new (☐ pending).
+
+> Naming: shots use their stable `Tools/ue_build_review_map.py` camera name (no
+> index prefix), so adding or reordering cameras never renumbers files or
+> orphans the old ones. Click an image for the full-size PNG.
 
 | File | Preview | View | What it shows |
 | --- | --- | --- | --- |
-| `review-00-overview.png` | [<img src="review-00-overview.png" alt="overview" width="200">](review-00-overview.png) | 7 m up, NE | Whole review layout: character + both cubes on the floor |
-| `review-01-character.png` | [<img src="review-01-character.png" alt="character" width="200">](review-01-character.png) | eye height, south | MPFB mannequin, idle pose + warm skin; feet meet the plane |
-| `review-02-scale-cubes.png` | [<img src="review-02-scale-cubes.png" alt="scale cubes" width="200">](review-02-scale-cubes.png) | south | Floating vs grounded cube: cast vs contact shadow |
-| `review-03-player-placement.png` | [<img src="review-03-player-placement.png" alt="player placement" width="200">](review-03-player-placement.png) | spawn | The `AGigLineCharacter` pawn, capsule height and landing |
-| `review-04-ground-contact.png` | [<img src="review-04-ground-contact.png" alt="ground contact" width="200">](review-04-ground-contact.png) | knee height, feet | Floating/sinking character is obvious here |
-| `review-05-shadow-compare.png` | [<img src="review-05-shadow-compare.png" alt="shadow compare" width="200">](review-05-shadow-compare.png) | low angle | Detached (floating) vs touching (grounded) shadows |
-| `review-06-hero-portals.png` | [<img src="review-06-hero-portals.png" alt="hero portals" width="200">](review-06-hero-portals.png) | 8 m, eye height | Three genuine 1.2 m portal recesses with flights and plinth |
-| `review-07-hero-facade-front.png` | [<img src="review-07-hero-facade-front.png" alt="hero facade front" width="200">](review-07-hero-facade-front.png) | road side, straight-on | Hero façade elevation and column rhythm |
-| `review-08-hero-facade-oblique.png` | [<img src="review-08-hero-facade-oblique.png" alt="hero facade oblique" width="200">](review-08-hero-facade-oblique.png) | north-west | Body depth and column line standing proud of the mass |
+| `review-overview.png` | [<img src="review-overview.png" alt="overview" width="200">](review-overview.png) | 7 m up, NE | Whole review layout: character + both cubes on the floor |
+| `review-character.png` | [<img src="review-character.png" alt="character" width="200">](review-character.png) | eye height, south | MPFB mannequin, idle pose + warm skin; feet meet the plane |
+| `review-scale-cubes.png` | [<img src="review-scale-cubes.png" alt="scale cubes" width="200">](review-scale-cubes.png) | south | Floating vs grounded cube: cast vs contact shadow |
+| `review-player-placement.png` | [<img src="review-player-placement.png" alt="player placement" width="200">](review-player-placement.png) | spawn | The `AGigLineCharacter` pawn, capsule height and landing |
+| `review-npc-prefab.png` | [<img src="review-npc-prefab.png" alt="npc prefab" width="200">](review-npc-prefab.png) | mid, west | The `AGigLineNPCPerson` prefab: collision capsule + visible MPFB body, feet on Z 0 (**new 2026-11-07**) |
+| `review-ground-contact.png` | [<img src="review-ground-contact.png" alt="ground contact" width="200">](review-ground-contact.png) | knee height, feet | Floating/sinking character is obvious here |
+| `review-shadow-compare.png` | [<img src="review-shadow-compare.png" alt="shadow compare" width="200">](review-shadow-compare.png) | low angle | Detached (floating) vs touching (grounded) shadows |
+| `review-hero-portals.png` | [<img src="review-hero-portals.png" alt="hero portals" width="200">](review-hero-portals.png) | 8 m, eye height | Three genuine 1.2 m portal recesses with flights and plinth |
+| `review-hero-facade-front.png` | [<img src="review-hero-facade-front.png" alt="hero facade front" width="200">](review-hero-facade-front.png) | road side, straight-on | Hero façade elevation and column rhythm |
+| `review-hero-facade-oblique.png` | [<img src="review-hero-facade-oblique.png" alt="hero facade oblique" width="200">](review-hero-facade-oblique.png) | north-west | Body depth and column line standing proud of the mass |
 
 ## Demo-map views
 
@@ -47,10 +52,10 @@ Rendered from `/Game/Hollywood/DemoMap`, the walkable level. Click an image for
 
 | File | Preview | Approval | What it shows |
 | --- | --- | --- | --- |
-| `demo/review-00-demo-spawn-view.png` | [<img src="demo/review-00-demo-spawn-view.png" alt="spawn view" width="200">](demo/review-00-demo-spawn-view.png) | ☑ | Spawn view: north sidewalk, the hero façade across the road |
-| `demo/review-01-demo-street-level.png` | [<img src="demo/review-01-demo-street-level.png" alt="street level" width="200">](demo/review-01-demo-street-level.png) | ☑ | Street level: portals, flights, banners, colonnade |
-| `demo/review-02-demo-crossing.png` | [<img src="demo/review-02-demo-crossing.png" alt="crossing" width="200">](demo/review-02-demo-crossing.png) | needs review | From the west, looking along the block (foreground blocking) |
-| `demo/review-03-demo-north-buildings.png` | [<img src="demo/review-03-demo-north-buildings.png" alt="north buildings" width="200">](demo/review-03-demo-north-buildings.png) | ☑ | North-side background buildings (TCL, Tussaud's) across the Blvd |
+| `demo/review-demo-spawn-view.png` | [<img src="demo/review-demo-spawn-view.png" alt="spawn view" width="200">](demo/review-demo-spawn-view.png) | ☑ | Spawn view: north sidewalk, the hero façade across the road |
+| `demo/review-demo-street-level.png` | [<img src="demo/review-demo-street-level.png" alt="street level" width="200">](demo/review-demo-street-level.png) | ☑ | Street level: portals, flights, banners, colonnade |
+| `demo/review-demo-crossing.png` | [<img src="demo/review-demo-crossing.png" alt="crossing" width="200">](demo/review-demo-crossing.png) | needs review | The designated mid-block crossing (s=130 m): zebra markings on the road, kerbs flushed to ramps. Camera on the north sidewalk looking south-west. Note: the road renders near-black in shadow — the fixed-daytime-lighting item, not the markings |
+| `demo/review-demo-north-buildings.png` | [<img src="demo/review-demo-north-buildings.png" alt="north buildings" width="200">](demo/review-demo-north-buildings.png) | ☑ | North-side background buildings (TCL, Tussaud's) across the Blvd |
 
 ## What to look for