feat(facades): 0.1.6 retail frontage first pass — Lee Drug and 6806-6820

Models the two retail buildings beside the hero from their own photograph rather
than the generic kit: bronze cornice, mural row, lettering band, stepped Deco
parapet and rounded corner tower on 6800 Lee Drug; burgundy fascia, pilasters,
white-framed windows and banded parapet on 6806-6820. Reference analysis written
before any geometry (Art/blender/retail/ref-analysis.md), every unmeasured
proportion carried into the part report as an assumption.

6822 Budget is deferred, not guessed: no photograph of it exists and the 6.0 x 5.5 m
sliver cannot be read out of the neighbour shot.

Pipeline fixes found on the way:
- render_screenshots.sh called ./Engine/... for the capture step while every
  commandlet used the absolute path; set -e killed the script at 127 *after* the
  maps were rebuilt, so screenshots silently stayed a day old.
- the facade kit applies to every Frontage_*/North_* actor, so it pasted its own
  language over the new modelled facades; it now skips them, and the trim stages as
  RetailTrim_*.
- pure bay arithmetic moved to Tools/_common.py so it is unit-testable without
  Blender (4 new tests, 82 total pass).

Known gaps recorded in Screenshots/README.md, not hidden: the parapet reads as a
blank band, murals and lettering do not resolve at review distance, the tower is a
plain cylinder, and the review camera crops the east end.

Art/blender/retail/ref-analysis.md

@@ -0,0 +1,76 @@
+# Reference analysis — retail frontage, 0.1.6
+
+Phase 0 of the `references` pack (reference-image-match). Written before any geometry,
+because the pass that produced the hero façade skipped it and cost two rebuilds.
+
+## Source
+
+| | |
+| --- | --- |
+| Image | `Art/reference/retail-neighbours/01-lee-drug-and-neighbor.jpg` (1920×953) |
+| Author / licence | Gb321, own work, **CC BY-SA 4.0** — attribution required |
+| Captured | 2024-07-19 11:11 local |
+| Description | "Lee Drug and 6806 Hollywood Buildings in Hollywood" |
+| Coverage | Both target buildings in one frame, mid-morning sun from the south-east |
+
+**One photograph is the whole evidence base for 6800 and 6806–6820.** It is a street-level
+oblique, not an elevation: verticals converge, the ground floor of 6806–6820 is partly behind
+a parked car, and the Lee Drug shopfront is behind a bus. Everything below that the photo does
+not resolve is marked *assumed* and is carried into the part report.
+
+**6822 Budget has no photograph.** It is a 6.0 m × 5.5 m single-storey sliver west of
+6806–6820, and the TODO item already records that Commons has nothing usable. It stays a
+blockout extrusion and the item is deferred rather than guessed.
+
+## Measured (not from the photo)
+
+From `Geo/raw/osm-api-map-2026-11-06.osm` and the blockout, in the shared frame
+(metres, X east, Y north, Z from the project datum):
+
+| Building | OSM way | X | Front face Y | Height | Depth |
+| --- | --- | --- | --- | --- | --- |
+| 6800 Lee Drug | 424024149 | −33.20 … −14.37 | −14.63 | 12.10 m | 33.5 m |
+| 6806–6820 | 424024150 | −66.08 … −33.07 | −12.52 | 12.10 m | 30.8 m |
+| 6822 Budget | 424024144 | −78.54 … −72.52 | −12.92 | 5.50 m | 15.4 m |
+
+Both target buildings are 12.10 m tall, which makes the *relative* proportions in the photo
+directly usable: the parapet line, the cornice and the shopfront line can be read as fractions
+of the frame height.
+
+## 6800 Lee Drug — reading
+
+| Category | Observation |
+| --- | --- |
+| Subject | Corner retail block at Hollywood × Highland; the street face and the corner return are both visible |
+| Silhouette | Long low box, broken by a **rounded corner tower** that rises above the frontage parapet; the parapet is **stepped**, not flat |
+| Storeys | Two zones, not storeys: a tall shopfront zone and a single tall display wall above it |
+| Proportion (vertical) | Shopfront ≈ 0 → 0.36 H; bronze cornice ≈ 0.36 → 0.43 H; mural + lettering wall ≈ 0.43 → 0.82 H; stepped parapet ≈ 0.82 → 1.0 H (*assumed split; read off the frame, ±0.03 H*) |
+| Proportion (horizontal) | Corner tower occupies ≈ 4 m of the east end; eight mural panels at roughly 2.2 m centres along the frontage |
+| Colour | Cream stucco wall `#EDE6D8`, bronze/brown cornice `#6B4A2F`, near-black mural plates `#1C1A18`, dark glazing `#20262A` (*sampled from the frame*) |
+| Unique features | Stepped Deco parapet with 4 horizontal reveal lines; projecting bronze cornice; row of black celebrity-portrait panels; large dark "SOUVENIRS OF …" lettering on the upper wall; shopfront glazing with slim mullions |
+| Mood | 1930s Deco retail, freshly painted, bright midday |
+
+## 6806–6820 — reading
+
+| Category | Observation |
+| --- | --- |
+| Silhouette | Flat-fronted two-storey block; parapet steps up in fins at the west end |
+| Proportion (vertical) | Shopfront ≈ 0 → 0.32 H; burgundy fascia band ≈ 0.32 → 0.38 H; window storey ≈ 0.38 → 0.62 H; blank wall + parapet ≈ 0.62 → 1.0 H (*assumed*) |
+| Horizontal | Brown pilaster strips divide the frontage into roughly 3 m bays; seven upper windows across 33 m |
+| Colour | Same cream stucco; brown pilasters `#6B4A2F`; **burgundy-green** fascia `#5B3A3A`; white window frames |
+| Unique features | Banded parapet with 3 reveal lines; white-framed upper windows with security bars; shopfront glazing behind a burgundy fascia |
+
+## Camera match (for the review shot)
+
+The photo is a street-level oblique from the **north** side looking south-east, subject filling
+~80 % of the frame width. The demo review shot must reproduce that: camera at 1.7 m on the
+north sidewalk, yaw toward the south frontage, 35–42° lens, both buildings in frame. A wide
+block view will not compare usefully against this crop.
+
+## Assumptions to carry into the model report
+
+1. Vertical proportions, as above — the photo's convergence makes a pixel-perfect read impossible.
+2. Mural panel size and spacing; the lettering is modelled as a recessed plate, not as text.
+3. Shopfront bay spacing on both buildings; the bus hides most of Lee Drug's ground floor.
+4. Parapet reveal line count (4 on Lee Drug, 3 on 6806–6820).
+5. Corner tower radius; only the outer curve is visible.

MEMORY.md

@@ -523,3 +523,11 @@ Scope: facts and traps that cost time to establish. Planned work lives in [TODO.
 - Precedent applied again: tag when the stated scope is done, carry blocked scope
   into the next patch rather than letting a release wait indefinitely on missing
   reference photography.
+
+## 2026-11-09 — Retail frontage and two pipeline traps
+
+- **`Tools/render_screenshots.sh` called `./Engine/...` for the capture step** while every commandlet above went through `run_cmdlet`'s `cd "$ENGINE"`. With `set -e` the script died at exit 127 *after* rebuilding the maps, so the PNGs silently stayed a day old and `--verify` never ran. Fixed to `"$ENGINE/Engine/Binaries/..."`. Symptom to remember: maps rebuild, screenshots do not move.
+- **The generic façade kit is applied to every actor labelled `Frontage_*` or `North_*`**, so staging a hand-modelled façade under those labels gets the kit pasted over it — two contradicting façade languages on one wall. `ue_apply_facade_kit.py` now skips `MODELLED` labels, and retail trim stages as `RetailTrim_*`.
+- **A Blender builder cannot be imported by a unit test** (`import bpy` at module scope). Pure layout arithmetic lives in `Tools/_common.py`; `Tools/tests/test_retail_frontage.py` tests it there, and the builder delegates. Same trick `fbx_export_preset.py` uses for its preset dicts.
+- **Joining 85 parts into one mesh per building** before export cut the Unreal import from 85 assets to 2, and the staging step to two spawns. Record per-part dimensions *before* the join: after it only the joined bounds exist.
+

Screenshots/README.md

@@ -22,6 +22,7 @@ Each shot has an **expectation** in [`Tools/visual_targets.json`](../Tools/visua
 | 2 | `demo/review-demo-street-level.png` | eye height, north side | Street level: the hero colonnade with the adjacent frontage buildings either side, shopfronts at pavement level | ☑ 2026-11-09 | ☑ 2026-11-09 |
 | 3 | `demo/review-demo-crossing.png` | along the crosswalk | The designated mid-block crossing (s=130 m, UE X −14956): zebra bars on the asphalt, south frontage and colonnade behind | ☑ 2026-11-09 | ☑ 2026-11-09 |
 | 4 | `demo/review-demo-north-buildings.png` | across the Boulevard | The two north-side buildings (TCL Chinese Theatre, Madame Tussaud's) from the south side, full height in frame | ☑ 2026-11-09 | ☑ 2026-11-09 |
+| 5 | `demo/review-demo-retail-frontage.png` | north sidewalk, level horizon | The retail run beside the hero: 6800 Lee Drug's bronze cornice, mural row and parapet next to 6806–6820's burgundy fascia, pilasters and window storey | ☑ 2026-11-09 | ☐ pending |
 
 Approval is per shot, in the table above (owner review of the `0.1.4` set, recorded in [`Docs/reviews/0.1.4-review.md`](../Docs/reviews/0.1.4-review.md)). Add a row when a shot is added; remove the file in the same change when a shot is retired.
 
@@ -49,3 +50,20 @@ Note the comparison is only meaningful when the shot and the reference frame the
 - Banners sit on the column line rather than flush to the wall (they hang on the columns in the photographs, so this is acceptable).
 - Between kerb and building line the walkable surface is the terrain mesh, not a modelled pavement.
 - The El Capitan Theatre has no marquee or blade sign yet — the feature that makes it read as itself.
+
+## 0.1.6 retail frontage — what to look at
+
+Shot 5 is the review shot for this pass. Read it against
+`Art/reference/retail-neighbours/01-lee-drug-and-neighbor.jpg` (Gb321, CC BY-SA 4.0).
+
+Known gaps in this first pass, recorded rather than hidden:
+
+- **The parapet reads as a blank white band.** It is modelled as one 2.18 m wall with four
+  0.10 m reveal strips, and at review distance the strips disappear into the wash.
+- **The mural row and lettering band barely read.** They are shallow plates (0.06–0.08 m) on
+  the same plane as the wall; they need either depth or a decal before they read as the
+  photographs' black-framed panels.
+- **The corner tower is a plain cylinder with two cap rings** — the stepped Deco profile in the
+  photograph is richer than that.
+- **The camera crops the east end** of Lee Drug at 68° from the north sidewalk.
+- **6822 Budget is untouched** and still a bare blockout volume: no photograph of it exists.

TODO.md

@@ -15,7 +15,10 @@ Suggested blender skills: **references** (reference-image-match), **archviz**, *
 
 ### Patch tasks - active - session-5598ce7e-27e3-4c64-bb49-c04a4a31ee58 (branch `facade-retail-0.1.6`)
 
-- [A] **Model 6822 Budget, 6806–6820 and 6800 Lee Drug from their own references.** `Art/reference/retail-neighbours/` holds 6800 and its neighbour (Gb321, CC BY-SA 4.0); Commons has nothing usable for 6822 or 6806–6820, so those two need photography before they can be modelled honestly. Do not substitute the El Capitan Theatre's 18-frame set — it would misattribute the façades.
+- [A] **Model 6800 Lee Drug and 6806–6820 from their own reference.** First pass 2026-11-09 on branch `facade-retail-0.1.6`: `Tools/retail_frontage_build.py` builds both façades from the one photograph (`Art/reference/retail-neighbours/`, Gb321 CC BY-SA 4.0) with the analysis in `Art/blender/retail/ref-analysis.md`;
+  `Tools/ue_import_retail_detail.py` imports them and the demo builder stages them as `RetailTrim_*`. The generic façade kit is now skipped on these two, so their walls carry one façade language instead of two.
+  **Open on this item:** the parapet reads as a blank band, the mural row and lettering band do not resolve at review distance, the corner tower is a plain cylinder, and the review camera crops the east end — all listed in `Screenshots/README.md`.
+- [D] **Model 6822 Budget.** Deferred: no photograph exists for it (Commons has nothing usable) and the single-storey 6.0 × 5.5 m volume cannot be read from the neighbour shot. Needs photography before it can be modelled honestly; do not substitute the El Capitan Theatre's set or the 6806–6820 shot.
 - [ ] Review every façade change with `Tools/render_screenshots.sh --verify` before tagging.
 - [ ] Tag `v0.1.6` and write `CHANGELOG.md` entry; then remove this section.
 

Tools/README.md

@@ -17,7 +17,10 @@ Geographic tools live in [`Geo/tools/`](../Geo/README.md) and the Blender-side b
 | --- | --- |
 | `check-lfs.sh` | Fails if the `lfs` filter is missing or an LFS-tracked file was committed as a plain blob |
 | `facade_kit_build.py` | Builds the reusable façade **module kit** at the measured 4.96 m bay: pilaster, sill, lintel, window bay (surround + glazing), shopfront bay (piers, glass, fascia), door bay (jambs, door, threshold), cornice and parapet + coping. Exports each piece with the shared preset plus a JSON part report (dims + evidence per piece). |
+| `ue_import_retail_detail.py` | Imports the two retail trim meshes into `/Game/Hollywood/Frontage` with complex-as-simple collision — the trim decorates a solid the player already collides with, so it must not add snag points. Staged by the demo builder as `RetailTrim_*`. |
 | `ue_import_facade_kit.py` | Imports the kit into `/Game/Hollywood/Kit/*` as static meshes with complex-as-simple collision; writes `/tmp/gigline/kit-import.txt`. |
+| `retail_frontage_build.py` | Retail frontage trim for **6800 Lee Drug** and **6806–6820** (0.1.6): bronze cornice, mural row, lettering band, stepped Deco parapet and rounded corner tower on Lee Drug; burgundy fascia, pilasters, white-framed windows and banded parapet on 6806–6820. Built in world coordinates from the blockout bounds, one joined mesh per building, JSON part report with the evidence behind every piece. `6822 Budget` is **not** built — no photograph exists. |
+| `retail_frontage_build.py` | Retail frontage trim for **6800 Lee Drug** and **6806–6820** (0.1.6): bronze cornice, mural row, lettering band, stepped Deco parapet and rounded corner tower on Lee Drug; burgundy fascia, pilasters, white-framed windows and banded parapet on 6806–6820. Built in world coordinates from the blockout bounds, one joined mesh per building, JSON part report with the evidence behind every piece. `6822 Budget` is **not** built — no photograph exists. |
 | `theatre_trim_build.py` | El Capitan Theatre trim: projecting marquee canopy, illuminated fascia, recessed soffit, vertical blade sign with frame and bracket. Built **in world coordinates** (span and pavement height baked in) with a JSON part report, so staging is a single spawn at the origin. |
 | `ue_stage_theatre_trim.py` | Imports the trim to `/Game/Hollywood/Theatre` and stages one actor per piece in the DemoMap with site materials; clears a previous run first. |
 | `ue_apply_facade_kit.py` | Lays the kit over a building's street face from its own bounding box: bay count = round(width / 4.96), storeys from the height, shopfronts on the ground floor, windows above, pilasters on bay boundaries, cornice and parapet at the top. Clears a previous application first; unique labels per building. |

Tools/_common.py

@@ -0,0 +1,27 @@
+"""Shared helpers that must stay importable outside Blender and Unreal.
+
+Blender-side builders import `bpy` at module scope, so nothing in them can be unit
+tested. Pure layout arithmetic lives here instead: the builders import it, and
+`Tools/tests/` imports it without a 3D application.
+
+Standard library only.
+"""
+
+from __future__ import annotations
+
+
+def bay_centres(x0, x1, margin=0.9, bay=2.2):
+    """Centres of equal bays across a frontage, inset by `margin` at each end.
+
+    Used by the façade kit and the retail frontage so both use one rhythm. The count
+    is the span divided by the bay module and rounded, so a 33 m frontage at a 2.2 m
+    module gets 14 bays rather than one bay per 2.2 m of wall with a stub at the end.
+
+    Returns [] when the margins consume the whole frontage.
+    """
+    span = (x1 - x0) - 2.0 * margin
+    if span <= 0:
+        return []
+    count = max(1, int(round(span / bay)))
+    step = span / count
+    return [x0 + margin + step * (i + 0.5) for i in range(count)]

Tools/render_screenshots.sh

@@ -39,7 +39,10 @@ run_cmdlet ue_build_review_map.py "5/6 stage the demo shot cameras"
 tail -3 /tmp/ue-review-map-result.txt 2>/dev/null || true
 
 echo "== 6/6 capture the demo map =="
-./Engine/Binaries/Linux/UnrealEditor-Cmd "$PROJ" /Game/Hollywood/DemoMap \
+# The engine path is absolute: this step runs from the repo, not from $ENGINE, and a
+# bare ./Engine/... failed with "No such file or directory" while every commandlet
+# above succeeded through run_cmdlet's cd.
+"$ENGINE/Engine/Binaries/Linux/UnrealEditor-Cmd" "$PROJ" /Game/Hollywood/DemoMap \
   -game -windowed -ResX=1920 -ResY=1080 -nopause -nosplash -stdout
 
 echo "== collect the demo screenshots =="

Tools/retail_frontage_build.py

@@ -0,0 +1,329 @@
+#!/usr/bin/env python3
+"""Retail frontage trim for 6800 Lee Drug and 6806–6820 (0.1.6).
+
+Both buildings are bare OSM extrusions with a flat stucco material; what makes them
+read as *the* retail run beside the hero is the façade layer: the bronze cornice and
+stepped Deco parapet on Lee Drug, and the pilaster-and-fascia rhythm on 6806–6820.
+
+The trim is built **in world coordinates** in the shared frame (metres, X east,
+Y north, Z from the project datum), so the export carries its position and the
+Unreal staging step is a single spawn at the origin — the same convention as
+`Tools/theatre_trim_build.py` and `Tools/export_block_frontage.py`.
+
+    blender -b --factory-startup --python Tools/retail_frontage_build.py -- \
+        --out /tmp/gigline/retail --report /tmp/gigline/retail-report.json
+
+Bounds are **measured**, not assumed: they are the blockout objects' world bounds
+(`Lee Drug Building`, `element.019`), which sit at Z 0 with the volume top at 12.10 m.
+Vertical proportions come from the single reference photograph and are recorded with
+the assumption in `Art/blender/retail/ref-analysis.md`.
+
+6822 Budget is deliberately **not** built: there is no photograph of it, and the TODO
+item says so. Guessing its façade would be the misattribution the item warns against.
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import math
+import os
+import sys
+
+import bpy
+
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+import _common  # noqa: E402
+import fbx_export_preset as fbx_preset  # noqa: E402
+
+# --- measured bounds, from the blockout (world metres) ------------------------
+# Lee Drug 6800, OSM way 424024149. Front face is the north edge (max Y).
+LD_X0, LD_X1 = -33.20, -14.37
+LD_FACE_Y = -14.63
+LD_H = 12.10
+
+# 6806-6820, OSM way 424024150.
+B6_X0, B6_X1 = -66.08, -33.07
+B6_FACE_Y = -12.52
+B6_H = 12.10
+
+# --- proportions, read off the reference photograph ---------------------------
+# Fractions of the 12.10 m height; see Art/blender/retail/ref-analysis.md for how
+# they were read and why they are assumptions at ±0.03 H.
+LD_SHOP_TOP = 0.36 * LD_H       # 4.36 m: shopfront glazing / cornice soffit
+LD_CORNICE_TOP = 0.43 * LD_H    # 5.20 m: top of the bronze band
+LD_MURAL_Z = (0.49 * LD_H, 0.61 * LD_H)
+LD_LETTER_Z = (0.65 * LD_H, 0.76 * LD_H)
+LD_PARAPET_Z = 0.82 * LD_H      # 9.92 m: bottom of the stepped parapet
+
+B6_SHOP_TOP = 0.32 * B6_H       # 3.87 m
+B6_FASCIA_TOP = 0.38 * B6_H     # 4.60 m
+B6_WINDOW_Z = (0.45 * B6_H, 0.60 * B6_H)
+B6_PARAPET_Z = 0.62 * B6_H      # 7.50 m
+
+BAY = 2.20                      # mural / bay rhythm on Lee Drug, assumed
+PROJECT = 0.55                  # bronze cornice projection, assumed
+TOWER_R = 2.10                  # Lee Drug corner tower radius, assumed
+
+PARTS: list[dict] = []
+
+
+def make_material(name, rgb, rough=0.6, metallic=0.0):
+    """Principled material with an explicit colour; the export preset carries it as a slot."""
+    mat = bpy.data.materials.new(name)
+    mat.use_nodes = True
+    bsdf = mat.node_tree.nodes.get("Principled BSDF")
+    bsdf.inputs["Base Color"].default_value = (rgb[0], rgb[1], rgb[2], 1.0)
+    bsdf.inputs["Roughness"].default_value = rough
+    bsdf.inputs["Metallic"].default_value = metallic
+    return mat
+
+
+def clear_scene():
+    bpy.ops.object.select_all(action="SELECT")
+    bpy.ops.object.delete(use_global=False)
+    for mesh in list(bpy.data.meshes):
+        if mesh.users == 0:
+            bpy.data.meshes.remove(mesh)
+
+
+def cube(name, x, y, z, dx, dy, dz, material):
+    bpy.ops.mesh.primitive_cube_add(size=1.0, location=(x, y, z))
+    obj = bpy.context.active_object
+    obj.name = name
+    obj.scale = (dx, dy, dz)
+    bpy.ops.object.transform_apply(location=False, rotation=False, scale=True)
+    obj.data.materials.append(material)
+    return obj
+
+
+def cylinder(name, x, y, z, radius, height, material, vertices=28):
+    bpy.ops.mesh.primitive_cylinder_add(vertices=vertices, radius=radius, depth=height,
+                                        location=(x, y, z))
+    obj = bpy.context.active_object
+    obj.name = name
+    bpy.ops.object.transform_apply(location=False, rotation=False, scale=True)
+    obj.data.materials.append(material)
+    return obj
+
+
+def bay_centres(x0, x1, margin=0.9, bay=BAY):
+    """Bay centres; the arithmetic lives in `_common` so it is testable without Blender."""
+    return _common.bay_centres(x0, x1, margin=margin, bay=bay)
+
+
+def note(obj, evidence):
+    PARTS.append({
+        "object": obj.name,
+        "asset": "SM_" + obj.name,
+        "dims_m": [round(d, 3) for d in obj.dimensions],
+        "location_m": [round(c, 3) for c in obj.location],
+        "evidence": evidence,
+    })
+    print(f"[retail] {obj.name:26} {obj.dimensions.x:6.2f} x {obj.dimensions.y:5.2f} "
+          f"x {obj.dimensions.z:5.2f} m  ({evidence})")
+
+
+def build_lee_drug(mats):
+    """6800 Lee Drug: bronze cornice, mural row, lettering band, stepped Deco parapet,
+    rounded corner tower."""
+    stucco, bronze, mural, glass, white = (mats["stucco"], mats["bronze"], mats["mural"],
+                                           mats["glass"], mats["white"])
+    parts = []
+    cx = (LD_X0 + LD_X1) / 2.0
+    width = LD_X1 - LD_X0
+
+    # Bronze cornice: the strongest horizontal line on the building.
+    cornice = cube("LD_Cornice", cx, LD_FACE_Y + PROJECT / 2.0,
+                   (LD_SHOP_TOP + LD_CORNICE_TOP) / 2.0,
+                   width + 0.4, PROJECT, LD_CORNICE_TOP - LD_SHOP_TOP, bronze)
+    parts.append((cornice, "photographs: projecting bronze cornice over the shopfront; "
+                           f"{PROJECT:.2f} m projection assumed"))
+
+    # Shopfront glazing, recessed behind the face, one panel per bay.
+    for i, bx in enumerate(bay_centres(LD_X0, LD_X1, margin=1.2), start=1):
+        panel = cube(f"LD_ShopGlass_{i}", bx, LD_FACE_Y + 0.12, LD_SHOP_TOP / 2.0,
+                     BAY - 0.30, 0.10, LD_SHOP_TOP - 0.55, glass)
+        parts.append((panel, "photographs: full-height shopfront glazing; bay width and "
+                             "the 0.55 m kickplate are assumed (a bus hides this zone)"))
+        mullion = cube(f"LD_Mullion_{i}", bx - (BAY - 0.30) / 2.0, LD_FACE_Y - 0.02,
+                       LD_SHOP_TOP / 2.0, 0.10, 0.16, LD_SHOP_TOP - 0.55, bronze)
+        parts.append((mullion, "assumption: slim mullion at each bay boundary"))
+
+    # Celebrity-portrait panels, one per bay, in the band above the cornice.
+    z0, z1 = LD_MURAL_Z
+    for i, bx in enumerate(bay_centres(LD_X0, LD_X1, margin=1.2), start=1):
+        panel = cube(f"LD_Mural_{i}", bx, LD_FACE_Y - 0.04, (z0 + z1) / 2.0,
+                     BAY - 0.75, 0.08, z1 - z0, mural)
+        parts.append((panel, "photographs: row of black-framed portrait panels; count and "
+                             "size assumed from the visible row"))
+
+    # Lettering band: a recessed plate, not text. Reproducing the lettering needs a
+    # decal, which is a materials-pass job.
+    lz0, lz1 = LD_LETTER_Z
+    letter = cube("LD_LetterBand", cx, LD_FACE_Y - 0.03, (lz0 + lz1) / 2.0,
+                  width - 3.0, 0.06, lz1 - lz0, mural)
+    parts.append((letter, "photographs: large dark lettering across the upper wall; "
+                          "modelled as a recessed plate, the text itself is a decal job"))
+
+    # Stepped Deco parapet: wall band plus four horizontal reveals.
+    para = cube("LD_Parapet", cx, LD_FACE_Y + 0.10, (LD_PARAPET_Z + LD_H) / 2.0,
+                width + 0.2, 0.30, LD_H - LD_PARAPET_Z, stucco)
+    parts.append((para, "photographs: parapet steps above the frontage wall; "
+                        "thickness assumed"))
+    for i in range(4):
+        z = LD_PARAPET_Z + (LD_H - LD_PARAPET_Z) * (i + 1) / 5.0
+        groove = cube(f"LD_ParapetReveal_{i + 1}", cx, LD_FACE_Y - 0.03, z,
+                      width + 0.2, 0.07, 0.10, mural)
+        parts.append((groove, "photographs: four horizontal reveal lines in the parapet; "
+                              "count read off the frame"))
+
+    # Rounded corner tower at the east end, stepped twice at the top. The centre
+    # sits INSIDE the footprint so the tower projects 0.35 m from the face instead of
+    # bulging 4 m into the pavement, which the first run did.
+    tower_y = LD_FACE_Y - TOWER_R + 0.35
+    tower = cylinder("LD_CornerTower", LD_X1 - TOWER_R, tower_y,
+                     (LD_H - 0.9) / 2.0, TOWER_R, LD_H - 0.9, stucco)
+    parts.append((tower, "photographs: rounded Deco corner tower rising above the "
+                         f"frontage; {TOWER_R:.2f} m radius assumed"))
+    # Cap rings stack exactly to the measured 12.10 m top: 11.20 -> 11.75 -> 12.10.
+    cap_z = LD_H - 0.9
+    for i, (dh, radius) in enumerate(((0.55, TOWER_R - 0.35), (0.35, TOWER_R - 0.70)), start=1):
+        cap = cylinder(f"LD_TowerCap_{i}", LD_X1 - TOWER_R, tower_y,
+                       cap_z + dh / 2.0, radius, dh, white)
+        parts.append((cap, "photographs: two stepped cap rings on the tower"))
+        cap_z += dh
+    return parts
+
+
+def build_6806(mats):
+    """6806–6820: burgundy fascia, brown pilasters, white-framed windows, banded parapet."""
+    stucco, bronze, glass, white, burgundy = (mats["stucco"], mats["bronze"], mats["glass"],
+                                              mats["white"], mats["burgundy"])
+    parts = []
+    cx = (B6_X0 + B6_X1) / 2.0
+    width = B6_X1 - B6_X0
+
+    fascia = cube("B6_Fascia", cx, B6_FACE_Y - 0.02,
+                  (B6_SHOP_TOP + B6_FASCIA_TOP) / 2.0, width, 0.22,
+                  B6_FASCIA_TOP - B6_SHOP_TOP, burgundy)
+    parts.append((fascia, "photographs: dark fascia band over the shopfront; colour "
+                          "sampled, height assumed"))
+
+    centres = bay_centres(B6_X0, B6_X1, margin=1.0)
+    for i, bx in enumerate(centres, start=1):
+        panel = cube(f"B6_ShopGlass_{i}", bx, B6_FACE_Y + 0.12, B6_SHOP_TOP / 2.0,
+                     BAY - 0.25, 0.10, B6_SHOP_TOP - 0.45, glass)
+        parts.append((panel, "photographs: framed shopfront glazing behind the fascia"))
+        # Brown pilaster on every second bay boundary, as the photo shows.
+        if i % 2 == 1:
+            pil = cube(f"B6_Pilaster_{i}", bx, B6_FACE_Y - 0.10,
+                       (B6_FASCIA_TOP + B6_PARAPET_Z) / 2.0, 0.40, 0.22,
+                       B6_PARAPET_Z - B6_FASCIA_TOP, bronze)
+            parts.append((pil, "photographs: brown pilaster strips dividing the frontage"))
+
+    wz0, wz1 = B6_WINDOW_Z
+    for i, bx in enumerate(centres, start=1):
+        frame = cube(f"B6_WindowFrame_{i}", bx, B6_FACE_Y - 0.06, (wz0 + wz1) / 2.0,
+                     1.70, 0.14, wz1 - wz0, white)
+        parts.append((frame, "photographs: white-framed upper windows with security bars; "
+                             "count and size assumed"))
+        pane = cube(f"B6_WindowGlass_{i}", bx, B6_FACE_Y + 0.02, (wz0 + wz1) / 2.0,
+                    1.46, 0.08, wz1 - wz0 - 0.24, glass)
+        parts.append((pane, "photographs: dark glazing inside each frame"))
+
+    para = cube("B6_Parapet", cx, B6_FACE_Y + 0.08, (B6_PARAPET_Z + B6_H) / 2.0,
+                width + 0.2, 0.26, B6_H - B6_PARAPET_Z, stucco)
+    parts.append((para, "photographs: parapet band above the window storey; thickness assumed"))
+    for i in range(3):
+        z = B6_PARAPET_Z + (B6_H - B6_PARAPET_Z) * (i + 1) / 4.0
+        groove = cube(f"B6_ParapetReveal_{i + 1}", cx, B6_FACE_Y - 0.03, z,
+                      width + 0.2, 0.07, 0.09, bronze)
+        parts.append((groove, "photographs: three reveal lines in the parapet; count assumed"))
+    return parts
+
+
+def join_parts(parts, name):
+    """Join one building's parts into a single mesh so Unreal imports one asset.
+
+    The per-part dimensions and evidence are recorded before this runs, so joining
+    loses nothing from the report. Materials survive as separate slots.
+    """
+    bpy.ops.object.select_all(action="DESELECT")
+    for obj, _text in parts:
+        obj.select_set(True)
+    bpy.context.view_layer.objects.active = parts[0][0]
+    bpy.ops.object.join()
+    joined = bpy.context.active_object
+    joined.name = name
+    bpy.ops.object.transform_apply(location=False, rotation=False, scale=True)
+    return joined
+
+
+def export_objects(objects, out_dir):
+    count = 0
+    for obj in objects:
+        bpy.ops.object.select_all(action="DESELECT")
+        obj.select_set(True)
+        bpy.context.view_layer.objects.active = obj
+        fbx_preset.export_static(os.path.join(out_dir, "SM_" + obj.name + ".fbx"),
+                                 selection=True)
+        count += 1
+    return count
+
+
+def main(argv=None) -> int:
+    argv = sys.argv[sys.argv.index("--") + 1:] if "--" in sys.argv else []
+    ap = argparse.ArgumentParser(description=__doc__,
+                                 formatter_class=argparse.RawDescriptionHelpFormatter)
+    ap.add_argument("--out", default="/tmp/gigline/retail")
+    ap.add_argument("--report", default=None)
+    args = ap.parse_args(argv)
+    os.makedirs(args.out, exist_ok=True)
+
+    clear_scene()
+    mats = {
+        "stucco": make_material("M_Retail_Stucco", (0.86, 0.83, 0.76), rough=0.72),
+        "bronze": make_material("M_Retail_Bronze", (0.20, 0.11, 0.06), rough=0.45, metallic=0.35),
+        "mural": make_material("M_Retail_Mural", (0.035, 0.032, 0.030), rough=0.55),
+        "glass": make_material("M_Retail_Glass", (0.035, 0.045, 0.055), rough=0.15),
+        "white": make_material("M_Retail_White", (0.90, 0.88, 0.84), rough=0.60),
+        "burgundy": make_material("M_Retail_Burgundy", (0.20, 0.09, 0.09), rough=0.55),
+    }
+
+    ld_parts = build_lee_drug(mats)
+    b6_parts = build_6806(mats)
+    for obj, text in ld_parts + b6_parts:
+        note(obj, text)
+
+    # One mesh per building: 85 separate actors over the frontage would cost more
+    # draw calls than the trim is worth, and the staging step stays two spawns.
+    joined = [join_parts(ld_parts, "Retail_LeeDrug"), join_parts(b6_parts, "Retail_6806")]
+    for obj in joined:
+        print(f"[retail] joined {obj.name}: {len(obj.data.vertices)} verts, "
+              f"{len(obj.data.materials)} material slot(s), "
+              f"X {min(v.co.x for v in obj.data.vertices):.2f}.."
+              f"{max(v.co.x for v in obj.data.vertices):.2f}")
+    exported = export_objects(joined, args.out)
+    print(f"[retail] exported {exported} object(s) to {args.out}")
+
+    if args.report:
+        with open(args.report, "w", encoding="utf-8") as handle:
+            json.dump({
+                "scope": ["6800 Lee Drug (way 424024149)", "6806-6820 (way 424024150)"],
+                "deferred": ["6822 Budget (way 424024144): no photograph, not modelled"],
+                "bounds_m": {
+                    "lee_drug": [LD_X0, LD_X1, LD_FACE_Y, LD_H],
+                    "b6806": [B6_X0, B6_X1, B6_FACE_Y, B6_H],
+                },
+                "reference": "Art/reference/retail-neighbours/01-lee-drug-and-neighbor.jpg "
+                             "(Gb321, CC BY-SA 4.0)",
+                "analysis": "Art/blender/retail/ref-analysis.md",
+                "parts": PARTS,
+            }, handle, indent=2)
+        print(f"[retail] report -> {args.report}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

Tools/tests/test_retail_frontage.py

@@ -0,0 +1,32 @@
+"""Tests for the pure layout helper in Tools/retail_frontage_build.py.
+
+The builder itself needs Blender; `bay_centres` does not, so the bay rhythm the
+façade depends on is checkable without starting Blender or Unreal.
+"""
+
+import unittest
+
+from Tools._common import bay_centres
+
+
+class BayCentreTests(unittest.TestCase):
+    def test_centres_stay_inside_the_margins(self):
+        centres = bay_centres(-33.20, -14.37, margin=1.2)
+        self.assertGreaterEqual(min(centres), -33.20 + 1.2 - 1e-9)
+        self.assertLessEqual(max(centres), -14.37 - 1.2 + 1e-9)
+
+    def test_bays_are_evenly_spaced(self):
+        centres = bay_centres(-66.08, -33.07, margin=1.0)
+        steps = {round(b - a, 6) for a, b in zip(centres, centres[1:])}
+        self.assertEqual(len(steps), 1, f"uneven bay spacing: {steps}")
+
+    def test_bay_count_is_the_round_of_span_over_bay(self):
+        # 33.01 m frontage, 1.0 m margin each end -> 31.01 m -> 14 bays at 2.2 m.
+        self.assertEqual(len(bay_centres(-66.08, -33.07, margin=1.0)), 14)
+
+    def test_degenerate_frontage_returns_nothing(self):
+        self.assertEqual(bay_centres(0.0, 1.0, margin=1.0), [])
+
+
+if __name__ == "__main__":
+    unittest.main()

Tools/ue_apply_facade_kit.py

@@ -235,9 +235,17 @@ def main() -> None:
             removed += 1
     log(f"cleared {removed} previous kit actors")
 
+    # The kit is the fallback for buildings that have nothing but a blockout. These
+    # two are modelled from their own photograph in 0.1.6
+    # (Tools/retail_frontage_build.py); pasting the generic kit over them put a
+    # second, contradicting facade language on the same wall.
+    MODELLED = ("Frontage_SM_LeeDrug_6800", "Frontage_SM_Hollywood_6806")
     targets = [a for a in unreal.EditorLevelLibrary.get_all_level_actors()
-               if a.get_actor_label().startswith(("Frontage_", "North_"))]
-    log(f"frontage actors: {len(targets)}")
+               if a.get_actor_label().startswith(("Frontage_", "North_"))
+               and a.get_actor_label() not in MODELLED]
+    skipped = [a.get_actor_label() for a in unreal.EditorLevelLibrary.get_all_level_actors()
+               if a.get_actor_label() in MODELLED]
+    log(f"frontage actors: {len(targets)} (kit skipped on modelled facades: {skipped})")
     total = 0
     for actor in targets:
         total += apply_to_actor(actor, kit, materials)

Tools/ue_build_demo_map.py

@@ -597,6 +597,25 @@ def build():
             staged_frontage += 1
     log(f"staged {staged_frontage} frontage buildings")
 
+    # --- retail frontage trim (0.1.6) -------------------------------------
+    # The two retail buildings beside the hero are modelled from their own
+    # photograph (Art/reference/retail-neighbours/); the trim is laid over the
+    # blockout volume, so it keeps the trim's own sampled materials rather than a
+    # look-dev override. 6822 Budget has no photograph and stays a bare volume.
+    for asset_name, label in (("SM_Retail_LeeDrug", "6800 Lee Drug trim"),
+                              ("SM_Retail_6806", "6806-6820 trim")):
+        mesh = unreal.EditorAssetLibrary.load_asset(f"/Game/Hollywood/Frontage/{asset_name}")
+        if mesh is None:
+            log(f"MISSING trim {asset_name} — run Tools/ue_import_retail_detail.py")
+            continue
+        # RetailTrim_ rather than Frontage_ so the kit assembler leaves it alone.
+        actor = spawn(unreal.StaticMeshActor, unreal.Vector(0, 0, 0), f"RetailTrim_{asset_name}")
+        if actor:
+            comp = actor.static_mesh_component
+            comp.set_static_mesh(mesh)
+            comp.set_mobility(unreal.ComponentMobility.MOVABLE)
+            log(f"staged: {label}")
+
     # --- player start: north sidewalk, facing the hero frontage -------------
     # Signs were measured from the imported meshes rather than assumed: the FBX
     # preset flips north, so in Unreal the road spans Y -1382..+1047, the NORTH

Tools/ue_build_review_map.py

@@ -300,6 +300,12 @@ try:
             # on the north sidewalk looking along the crosswalk itself, which is
             # the pedestrian's view and shows the zebra bars as bars.
             ("demo-crossing", unreal.Vector(-15250, -2500, 400), unreal.Vector(-14956, 400, 150)),
+            # 0.1.6 retail frontage: 6800 Lee Drug (X -3340..-1417, face Y +1467)
+            # and 6806-6820 (X -6618..-3297, face Y +1252). Stand on the north
+            # sidewalk at 2 m, look south with a level horizon so the parapets and
+            # the cornice line read as horizontals. 68 deg covers both frontages at
+            # this distance; the ends crop rather than the elevation leaning.
+            ("demo-retail-frontage", unreal.Vector(-4700, -2000, 200), unreal.Vector(-4700, 1400, 560), 68.0),
             # the two north-side background buildings (TCL, Tussaud's) seen from
             # the south across Hollywood Blvd. Probed world-space (2026-11-08):
             # TCL bbox X -22889..-18442, Y -9431..-1802; Tussaud's X -27071..

Tools/ue_import_retail_detail.py

@@ -0,0 +1,94 @@
+# Import the retail frontage trim (6800 Lee Drug, 6806–6820) into Unreal.
+#
+#   blender -b --factory-startup --python Tools/retail_frontage_build.py -- \
+#       --out /tmp/gigline/retail --report /tmp/gigline/retail-report.json
+#   <engine>/Engine/Binaries/Linux/UnrealEditor-Cmd <uproject> -run=pythonscript \
+#     -script=<repo>/Tools/ue_import_retail_detail.py -nullrhi -unattended -nopause -stdout
+#
+# Two meshes arrive, one per building, each already at its world position in the
+# project frame (the FBX carries the offset), so staging spawns at the origin.
+# Destination: /Game/Hollywood/Frontage/<name> — same folder as the block frontage
+# so the demo builder stages them together.
+#
+# Result file: /tmp/gigline/retail-import.txt
+
+import glob
+import os
+
+import unreal
+
+SRC = "/tmp/gigline/retail"
+DEST = "/Game/Hollywood/Frontage"
+RESULT = "/tmp/gigline/retail-import.txt"
+lines = []
+
+
+def log(msg):
+    lines.append(str(msg))
+    unreal.log(str(msg))
+
+
+def import_fbx(path, name):
+    task = unreal.AssetImportTask()
+    task.filename = path
+    task.destination_path = DEST
+    task.destination_name = name
+    task.automated = True
+    task.save = True
+    task.replace_existing = True
+
+    ui = unreal.FbxImportUI()
+    ui.import_mesh = True
+    ui.import_materials = True
+    ui.import_textures = False
+    ui.import_as_skeletal = False
+    smd = ui.static_mesh_import_data
+    smd.import_uniform_scale = 1.0
+    smd.combine_meshes = True
+    smd.convert_scene_unit = False
+    smd.force_front_x_axis = False
+    smd.normal_import_method = unreal.FBXNormalImportMethod.FBXNIM_IMPORT_NORMALS
+    task.options = ui
+    unreal.AssetToolsHelpers.get_asset_tools().import_asset_tasks([task])
+
+    mesh = unreal.EditorAssetLibrary.load_asset(f"{DEST}/{name}")
+    if mesh is None:
+        log(f"MISSING after import: {DEST}/{name}")
+        return None
+
+    # Trim is decoration on a solid the player already collides with: no collision
+    # of its own, otherwise the cornice and mullions become snag points.
+    try:
+        body = mesh.get_editor_property("body_setup")
+        body.set_editor_property("collision_trace_flag",
+                                 unreal.CollisionTraceFlag.CTF_USE_COMPLEX_AS_SIMPLE)
+        mesh.set_editor_property("body_setup", body)
+    except Exception as exc:  # noqa: BLE001
+        log(f"{name}: collision flag not set ({exc!r})")
+
+    box = mesh.get_bounding_box()
+    mn, mx = box.min, box.max
+    log(f"{name:22} X {mn.x:8.0f}..{mx.x:8.0f}  Y {mn.y:7.0f}..{mx.y:7.0f}  "
+        f"Z {mn.z:5.0f}..{mx.z:5.0f}  slots {len(mesh.get_editor_property('static_materials'))}")
+    return mesh
+
+
+def main():
+    files = sorted(glob.glob(os.path.join(SRC, "*.fbx")))
+    if not files:
+        log(f"no FBX in {SRC}; run Tools/retail_frontage_build.py first")
+        return
+    for path in files:
+        import_fbx(path, os.path.splitext(os.path.basename(path))[0])
+    unreal.EditorLoadingAndSavingUtils.save_dirty_packages(True, True)
+
+
+try:
+    main()
+except Exception as exc:  # noqa: BLE001
+    import traceback
+    log(f"FAILED: {type(exc).__name__}: {exc}")
+    log(traceback.format_exc())
+
+with open(RESULT, "w") as f:
+    f.write("\n".join(lines) + "\n")

Tools/visual_targets.json

@@ -48,6 +48,18 @@
         "Art/reference/north-chinese/01-grauman-s-chinese-theatre-by-carol-highsmith.jpg"
       ],
       "expect": "The two north-side buildings (TCL Chinese Theatre, Madame Tussaud's) seen from across Hollywood Boulevard, full height in frame, daylight"
+    },
+    {
+      "name": "demo-retail-frontage",
+      "shot": "Screenshots/demo/review-demo-retail-frontage.png",
+      "size": [
+        1920,
+        1080
+      ],
+      "references": [
+        "Art/reference/retail-neighbours/01-lee-drug-and-neighbor.jpg"
+      ],
+      "expect": "The retail run beside the hero from across the street: 6800 Lee Drug's bronze cornice, mural row and stepped parapet next to 6806-6820's pilasters and window storey, daylight"
     }
   ]
 }