feat(facades): 0.1.5 — hero detail, scene audit, material orphaning fixed (#32)

Merged PR #32: 0.1.5 — hero detail, scene audit, material orphaning fixed

Co-authored-by: Zwitschi <zwitschi82@gmail.com>

Docs/build.md

@@ -86,8 +86,13 @@ The hero block and the demo level are built by a fixed sequence. Each step write
 | North import | `Tools/ue_import_north_buildings.py` | `/Game/Hollywood/North/*` |
 | Hero import | `Tools/ue_hero_facade_import.py` | `/Game/Hollywood/ElCapitan/SM_HeroFacade` |
 | Demo map | `Tools/ue_build_demo_map.py` | `/Game/Hollywood/DemoMap` |
+| Façade kit assembly | `Tools/ue_apply_facade_kit.py` | kit actors in `DemoMap` |
+| Theatre trim | `Tools/ue_stage_theatre_trim.py` | marquee + blade sign actors |
+| Scene audit | `Tools/ue_audit_scene.py` | materials, placement spans, labels (gate) |
 | Review shots | `Tools/ue_build_review_map.py` + `Tools/render_screenshots.sh` | `Screenshots/` |
 
+**Order matters.** `ue_build_demo_map.py` rebuilds the site materials, so any actor staged by another tool must be (re)staged _after_ it, or it keeps a reference to a material that no longer exists — that is how 604 actors once ended up untethered from their materials while the map only looked slightly flat. `Tools/render_screenshots.sh` runs the full chain in the right order and gates on `ue_audit_scene.py`.
+
 Every Blender exporter calls [`Tools/fbx_export_preset.py`](../Tools/fbx_export_preset.py) (`ue_metric_v1` / `ue_character_v1`) instead of repeating the FBX argument block — one place for the scale conversion, the axis mapping and `mesh_smooth_type="FACE"` (without which every Unreal import warns about missing smoothing groups and round geometry arrives faceted).
 
 Two rules that the pipeline enforces rather than documents:

Docs/perf/0.1.5-kit-walk-frametimes.csv

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Docs/release-checks.md

@@ -127,6 +127,22 @@ Run on the packaged build (`GigLineQA`, Development, Vulkan SM5) with `-qaselfte
 
 Committed frame-time series: `Docs/perf/0.1.0-walk-frametimes.csv`.
 
+### `0.1.5` re-measure with the façade kit in the map
+
+Same route, same preset, packaged Development build, **2560×1440**:
+
+| Metric  |           `0.1.0` | `0.1.5` (kit + textures) |
+| ------- | ----------------: | -----------------------: |
+| Average | 2.42 ms (414 fps) |    **2.76 ms (363 fps)** |
+| p50     |           2.38 ms |                  2.73 ms |
+| p95     |           2.71 ms |                  3.17 ms |
+| p99     |           3.01 ms |                  3.64 ms |
+| Max     |           4.00 ms |                  4.62 ms |
+
+The **625 kit actors and 8 generated textures cost about 12 %** of frame time and still leave **363 fps average, p99 3.64 ms** — roughly six times the 60 fps floor. Frame-time series: `Docs/perf/0.1.5-kit-walk-frametimes.csv`.
+
+**Measurement trap, again:** runs that reported ~105 fps were two game instances overlapping (a previous launch had not exited). Confirm a single instance (`pgrep -af Binaries/Linux/GigLine`) before trusting a figure — 363 fps reproduced twice on a clean run.
+
 ## `0.1.0` — Fresh checkout build — record (2026-11-08)
 
 Followed the documented steps in [`Docs/build.md`](build.md) exactly, into a clean directory with no prior state: