fix(hero): seat the motto band and surround on the parapet face

The motto band and moulded surround had the same burial as the medallions: offset
0.06 left their front face at Y -0.44, inside the 1.2 m-deep parapet, so the
'inset panel with a moulded surround' never rendered. Only the inscription (moved
to 0.40 in the previous commit) read.

- Band recessed at offset 0.34 (Y -0.16), surround proud at 0.43 (Y -0.07),
  inscription stays 0.40 (Y -0.10).
- Band is now light stone (was stone_dark): a dark band at the parapet face would
  have sat directly behind the dark inscription marks and swallowed them. The
  reference is dark incised lettering on a pale band.
- Removed the dead duplicate 'Hero_MottoBand 0.40' entry - the earlier 0.06 match
  won, so the 0.40 was silently ignored.

Rendered and judged; the advisory judge no longer flags the band.

Tools/blender/hero_facade_build.py

@@ -264,9 +264,11 @@ def build():
     for z_off in (-0.575, 0.575):
         cube(f"Hero_MottoSurround_h{int(z_off > 0)}", 0.0, -1.13, motto_z + z_off,
              motto_w + 0.64, 0.26, 0.32, stone)
-    cube("Hero_MottoBand", 0.0, -1.06, motto_z, motto_w, 0.10, 0.85, stone_dark)
-    # Dark marks, not stone-on-stone: at 45 m a same-colour relief disappears, and the reference letters read
-    # as dark incisions against the pale wall.
+    # Light stone band, not the dark panel the blockout used: the reference letters are
+    # dark incisions against a pale band, so a dark band would swallow the dark lettering.
+    # The band sits recessed behind its moulded surround while the surround and the
+    # lettering stand proud, so the frame and the text both read at 45 m.
+    cube("Hero_MottoBand", 0.0, -1.06, motto_z, motto_w, 0.10, 0.85, stone)
     inscription(motto_w - 0.6, motto_z, stone_dark)
     note("Hero_MottoBand", (motto_w, 0.10, 0.85),
          "photographs: motto panel above the colonnade, now an inset panel with a "
@@ -411,14 +413,16 @@ def build():
     # front face is behind the wall plane are moved until it sits at FRONT_Y + offset.
     seat_on_front((
         ("Hero_Architrave", 0.05), ("Hero_Cornice", 0.05), ("Hero_Dentil", 0.05),
-        ("Hero_Entablature", 0.03), ("Hero_MottoBand", 0.06), ("Hero_MottoSurround", 0.06),
+        ("Hero_Entablature", 0.03), ("Hero_MottoBand", 0.34), ("Hero_MottoSurround", 0.43),
         ("Hero_MedallionRim", 0.36), ("Hero_MedallionField", 0.43), ("Hero_MedallionBoss", 0.50),
         ("Hero_Banner", 0.08), ("Hero_Window", 0.03),
         ("Hero_Portal", 0.05), ("Hero_PortalJamb", 0.08), ("Hero_PortalLintel", 0.08),
         ("Hero_PortalMullion", 0.04), ("Hero_PortalSign", 0.10),
-        # The parapet is 1.2 m deep and stands in front of the wall plane, so the inscription has to sit on
-        # ITS face, not on FRONT_Y - otherwise the parapet hides the letters entirely.
-        ("Hero_Inscription", 0.40), ("Hero_MottoBand", 0.40),
+        # The parapet is 1.2 m deep and stands in front of the wall plane, so the attic detail
+        # (inscription, motto band, surround) has to sit on ITS face, not on FRONT_Y - the old
+        # 0.06/0.08 offsets left the band and surround buried inside the parapet. The band is
+        # recessed (0.34) behind the proud surround (0.43) and the lettering (0.40).
+        ("Hero_Inscription", 0.40),
     ))
 
     return parts, lines