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.

Tools/render_screenshots.sh

@@ -2,38 +2,55 @@
 # Render in-game screenshots for visual review into <repo>/Screenshots/ (gitignored).
 #
 # Usage: Tools/render_screenshots.sh
-# Rebuilds /Game/Test/ReviewMap from current content, runs the game on it
-# (the GigLineShotActor walks three cameras, captures, quits), then copies
-# the PNGs into Screenshots/.
+# Rebuilds /Game/Test/ReviewMap and /Game/Hollywood/DemoMap (shot lists), runs
+# the game on each map (the GigLineShotActor walks the cameras, captures, quits),
+# and copies the PNGs into Screenshots/. PNGs are never committed.
 set -euo pipefail
 
 REPO="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 ENGINE="${UE_ENGINE_DIR:-/run/media/system/DATA/Engines/UE_5.8.4}"
 PROJ="$REPO/Game/GigLine/GigLine.uproject"
 
-echo "== 1/3 build review map =="
+echo "== 1/4 build review + demo shot maps =="
 cd "$ENGINE"
 ./Engine/Binaries/Linux/UnrealEditor-Cmd "$PROJ" \
   -run=pythonscript -script="$REPO/Tools/ue_build_review_map.py" \
   -nullrhi -unattended -nopause -stdout
-cat /tmp/ue-review-map-result.txt
+cat /tmp/ue-review-map-result.txt | tail -3
 
-echo "== 2/3 run game on review map =="
-# -windowed -NoSplash: a fullscreen swap can leave the first frame uncaptured.
-./Engine/Binaries/Linux/UnrealEditor-Cmd "$PROJ" /Game/Test/ReviewMap \
-  -game -windowed -ResX=1920 -ResY=1080 -nopause -nosplash -stdout
+run_capture() {
+  local map="$1" label="$2"
+  echo "== capture: $label =="
+  ./Engine/Binaries/Linux/UnrealEditor-Cmd "$PROJ" "$map" \
+    -game -windowed -ResX=1920 -ResY=1080 -nopause -nosplash -stdout
+}
 
-echo "== 3/3 collect screenshots =="
-mkdir -p "$REPO/Screenshots"
-rm -f "$REPO"/Screenshots/review-*.png
+echo "== 2/4 run game on review map (hero/scene shots) =="
+run_capture "/Game/Test/ReviewMap" "review"
+
+echo "== 3/4 run game on demo map (walkable-demo shots) =="
+run_capture "/Game/Hollywood/DemoMap" "demo"
+
+echo "== 4/4 collect screenshots =="
+mkdir -p "$REPO/Screenshots/demo"
+rm -f "$REPO"/Screenshots/review-*.png "$REPO"/Screenshots/demo/review-*.png
 found=0
 for src in \
   "$REPO/Game/GigLine/Saved/Screenshots"/*/review-*.png \
   "$REPO/Game/GigLine/Saved/Screenshots"/*/*/review-*.png \
   "$HOME/.config/Epic/GigLine/Saved/Screenshots"/*/review-*.png; do
   [ -e "$src" ] || continue
-  cp -f "$src" "$REPO/Screenshots/"
+  name=$(basename "$src")
+  if [[ "$name" == review-?("")-demo-* || "$name" == review-*-demo-* || "$name" == review-0?-demo-* ]] \
+     || [[ "$name" == *demo-* ]]; then
+    cp -f "$src" "$REPO/Screenshots/demo/$name"
+  else
+    cp -f "$src" "$REPO/Screenshots/$name"
+  fi
   found=1
 done
 [ "$found" = "1" ] || { echo "ERROR: no review-*.png found"; exit 1; }
-ls -la "$REPO/Screenshots"
+echo "--- Screenshots/ ---"
+ls -1 "$REPO/Screenshots"
+echo "--- Screenshots/demo/ ---"
+ls -1 "$REPO/Screenshots/demo"