asset: two north-side background buildings across Hollywood Blvd

- TCL Chinese Theatre (6925) and Madame Tussaud's (6933) exported from the
  verified OSM blockout with ue_metric_v1 (export_north_buildings.py), with a
  Y-mirror so they land north of the road, across from the hero facade.
- ue_import_north_buildings.py imports + stages them in the DemoMap as
  North_TCL_Chinese / North_Madame_Tussauds (TCL Y 1802..9431, Tussaud's
  1888..7586; hero at Y -1450, road centreline ~0).
- render_screenshots.sh now also runs the DemoMap capture pass; added a
  demo-north-buildings camera, so the new buildings get a review shot.
- README/roadmap updated; flat facade materials pending the 0.1.4 patch.

ROADMAP.md

@@ -96,7 +96,7 @@ The MPFB character asset (idle pose + warm skin, done below) is planned as the t
 - [x] Download reference photography for the two north-side buildings inside the 50 m buffer — TCL Chinese Theatre (OSM way 424105908, 6925 Hollywood Blvd) and Madame Tussaud's (way 424105889, 6933 Hollywood Blvd). Done 2026-11-06 with `Tools/commons_fetch.py` against the Wikimedia Commons API: eleven frames in the local `Art/reference/north-chinese/` and `Art/reference/north-tussauds/`, provenance in each `sidecar.json`, nothing committed.
 - [x] Model hero façade for the El Capitan Entertainment Centre site. **Second pass built 2026-11-07** (proportions recalibrated from the 2009 photograph: entablature 3.4 m, parapet 2.2 m, architrave and cornice bands, square pedestals — the first pass had 5.7 m of blank wall above the capitals and read as a warehouse). **First pass built 2026-11-07** (`Tools/hero_facade_build.py` → `Art/blender/hero/hero-facade-2026-11-07.blend` + JSON part report with evidence per part → `Tools/ue_hero_facade_import.py` → `/Game/Hollywood/ElCapitan/SM_HeroFacade`, 1892 tris, 4 materials, placed on the measured building line). Six columns at 4.96 m over the 25.75 m frontage, plinth, three portal flights (5 risers, not the old 8), entablature 2.2 m, parapet 1.6 m with motto band and medallions. **Screenshot review pending** (`Screenshots/review-04`, `review-05`). Next pass: portal recesses read from the street, banner and window placement, then materials.
 - [ ] Model surrounding block frontage.
-- [-] Model simplified background buildings directly across Hollywood Boulevard. Owner: this session (01a1b26b). Taking the two in-scope north-side buildings — TCL Chinese Theatre (way 424105908, 6925) and Madame Tussaud's (way 424105889, 6933) — from the verified OSM blockout volumes, cleaned and exported with `ue_metric_v1`. Source positions measured: TCL centre (Blender local −206.50, 56.20), Tussaud's (−249.47, 47.20); hero façade placed in the demo map at Unreal (−10722.5, −1443.0).
+- [x] Model simplified background buildings directly across Hollywood Boulevard. Done 2026-11-07, the two in-scope north-side buildings — TCL Chinese Theatre (SM_TCL_Chinese_Theatre) and Madame Tussaud's (SM_Madame_Tussauds) — taken from the verified OSM blockout volumes and exported with `ue_metric_v1`, with a Y-mirror so they land north of Hollywood Blvd across the street from the hero (TCL spans Unreal Y 1802..9431, Tussaud's 1888..7586; road centreline ≈ 0, hero façade at Y −1450). Staged in the DemoMap as `North_TCL_Chinese` / `North_Madame_Tussauds`; demo shot `review-03-demo-north-buildings` captured. Simple flat facade materials (surfaces are the `0.1.4` patch).
 - [-] Build sidewalks, roads, and collision meshes. Terrain, road, sidewalks and kerbs exist (`Art/blender/terrain/`, `street/`) and are assembled in `site/site-2026-11-06.blend`; collision and details (crossing markings, kerb radii, aprons) are not built. Ground must follow the DEM: 3.94 m fall along the block, ~2 % crown between the gutters at ±10–11 m from the centreline, north sidewalk higher than south. Kerb height is an unresolved assumption — the DEM does not resolve it (`Geo/verification/2026-11-06-cross-sections.md`).
 - [ ] Materials and look development for all exported assets.