feat(hero): first pass from the masonic-temple reference folder

Art/reference/hero-masonic/ (15 images, git-ignored) replaces the single Wikimedia photo as the source of
truth. Two front elevations drive this pass: 02-masonictemple01.jpg, a clean street-level frontal, and
06-el-capitan-theater-frontal-fachade.jpg; 05-hollywoodmasonictemple-1922.jpg records the original masonry.

Changes:

- the blank Hero_Stylobate_LintelBand across the portals is removed - the reference has open doorways with
  steps, and they now read as three dark openings with banners above them;
- rustication(): five ashlar courses from the pavement to the portal heads, 4 cm joints proud of the wall;
- balustrade(): bottom rail, top rail and 38 balusters along the roof edge, where the reference shows a
  cresting and railing.

Still missing against the same references, and recorded: warm sandstone instead of flat pale stone, lattice
grilles in the window bays, the carved inscription, and medallions that do not read at distance.

The blend is read-only after a checkout - chmod u+w first or the save fails silently and the FBX is never
written, which happened once here.

Rows 4-6 re-rendered and pending review.

Screenshots/README.md

@@ -16,9 +16,9 @@ Both capture passes are produced by [`Tools/render_screenshots.sh`](../Tools/ren
 | 1 | ReviewMap | ![character feet](review/review-character-feet.png) | [x] | approved |
 | 2 | ReviewMap | ![character](review/review-character.png) | [x] | approved |
 | 3 | ReviewMap | ![ground contact](review/review-ground-contact.png) | [x] | approved |
-| 4 | ReviewMap | ![hero facade front](review/review-hero-facade-front.png) | [ ] | re-rendered after the detail was seated on the wall: banners, windows, portals and dentils are visible now; still flat stone, no lettering, blank band over the portals |
-| 5 | ReviewMap | ![hero facade oblique](review/review-hero-facade-oblique.png) | [ ] | re-rendered after the detail was seated on the wall: banners, windows, portals and dentils are visible now; still flat stone, no lettering, blank band over the portals |
-| 6 | ReviewMap | ![hero portals](review/review-hero-portals.png) | [ ] | re-rendered after the detail was seated on the wall: banners, windows, portals and dentils are visible now; still flat stone, no lettering, blank band over the portals |
+| 4 | ReviewMap | ![hero facade front](review/review-hero-facade-front.png) | [ ] | re-rendered after the first reference pass: portals open, courses cut, balustrade on the roof; still flat pale stone, no grilles, no inscription |
+| 5 | ReviewMap | ![hero facade oblique](review/review-hero-facade-oblique.png) | [ ] | re-rendered after the first reference pass: portals open, courses cut, balustrade on the roof; still flat pale stone, no grilles, no inscription |
+| 6 | ReviewMap | ![hero portals](review/review-hero-portals.png) | [ ] | re-rendered after the first reference pass: portals open, courses cut, balustrade on the roof; still flat pale stone, no grilles, no inscription |
 | 7 | ReviewMap | ![npc prefab](review/review-npc-prefab.png) | [x] |  |
 | 8 | ReviewMap | ![overview](review/review-overview.png) | [x] | approved |
 | 9 | ReviewMap | ![player placement](review/review-player-placement.png) | [x] | approved |