Add reference-anchored concept generation

docs/screens/concepts/hollywood_boulevard/README.md

@@ -10,6 +10,18 @@ game textures. The geometry mapping and source links are in
 
 ![El Capitan Entertainment Centre entrance in daylight](hollywood_boulevard_entrance_day.png)
 
+## Entrance — day, photo-anchored
+
+![El Capitan Entertainment Centre entrance in daylight, anchored on the 2009 facade photo](hollywood_boulevard_entrance_day-v2.png)
+
+Generated with `generate --reference`, anchored on the licence-cleared
+[`el-capitan-facade-day-wikimedia-2009-10-27.jpg`](../../refs/hollywood/el-capitan-facade-day-wikimedia-2009-10-27.jpg)
+board photo (CC BY 2.0); provenance in
+[`hollywood_boulevard_entrance_day-v2.refgen.json`](hollywood_boulevard_entrance_day-v2.refgen.json).
+The facade geometry (motto band, column rhythm, lattice windows, banner slots,
+blade sign) follows the photograph; the street is restaged clean for art
+direction.
+
 ## Entrance — night
 
 ![El Capitan Entertainment Centre entrance at night](hollywood_boulevard_entrance_night.png)