Polish movement hall interiors: clear doors and bay columns, tone floors and windows.

Document hang keep-outs and period-module fixes; leave columns fixed while packing frames into gaps.

Co-authored-by: Cursor <cursoragent@cursor.com>

Documentation/data-and-images.md

@@ -292,31 +292,41 @@ Every movement is built from the architecture of **its own period** — no two m
 | Module | Movements |
 |--------|-----------|
 | `MovementHallDetails.tsx` (reference implementations) | `gothic` — bay-spaced compound piers, vault springers, transverse ribs · `byzantine` — porphyry colonnettes, basket capitals, revetment dado, hanging polycandela |
-| `hall-details/classical.tsx` | `roman` (Tuscan half-columns, dentil entablature, Pompeian socle) · `quattrocento` (pietra serena pilasters, blind arcade, tondi) · `cinquecento` (paired fluted Corinthian pilasters, Pantheon coffers) |
-| `hall-details/courtly.tsx` | `flemish` (linenfold wainscot, beam-and-corbel ceiling) · `mannerist` (herm pilasters, banded rustication, broken cornice) · `baroque` (solomonic corner columns, modillions, velvet field panels) · `rococo` (boiserie, rocaille cartouches, painted cove) · `neoclassical` (fluted Ionic order, meander frieze) |
+| `hall-details/classical.tsx` | `roman` (Tuscan half-columns, dentil entablature, Pompeian socle) · `quattrocento` (pietra serena pilasters, blind arcade, tondi) · `cinquecento` (paired fluted Corinthian pilasters, plain coffered soffit — no gold rosettes; veined Carrara floor) |
+| `hall-details/courtly.tsx` | `flemish` (linenfold wainscot, beam-and-corbel ceiling; ribs skip the exit door) · `mannerist` (flush tapering herms, shallow rustication, broken cornice) · `baroque` (solomonic corner columns; gilt moulding rails around velvet panels, not solid slabs) · `rococo` (boiserie, rocaille cartouches, painted cove) · `neoclassical` (fluted Ionic order, meander frieze; cooler/darker floor tint) |
 | `hall-details/nineteenth.tsx` | `gothic-revival` · `bourgeois` · `north-light` · `paris-atelier` · `symbolist` · `art-nouveau` |
-| `hall-details/modernism.tsx` | `fauvist` · `expressionist` · `cubist-atelier` · `futurist` · `suprematist` · `constructivist` · `dada` · `surrealist` · `loft` · `white-cube` |
+| `hall-details/modernism.tsx` | `fauvist` · `expressionist` · `cubist-atelier` · `futurist` · `suprematist` · `constructivist` · `dada` (cream walls, collage panels, open `picture` windows — no factory bars) · `surrealist` (no freestanding “door to nowhere”) · `loft` (timber posts/joists, `picture` windows — no cast-iron columns or sprinkler pipe) · `white-cube` |
 
-`hall-details/primitives.tsx` holds the wall-flush building blocks (`WallBand`, `CorniceRing`, `FlutedShaft`, capitals, `CofferedCeiling`, `HangingFixture`, `WallSconce`); `hall-details/geometry.ts` holds the shared hooks and the **geometry budget** every module has to obey, because frames hang 0.23 m proud of the wall face with a 0.7 m clear margin at each wall end:
+`hall-details/primitives.tsx` holds the wall-flush building blocks (`WallBand`, `CorniceRing`, `FlutedShaft`, capitals, `CofferedCeiling`, `HangingFixture`, `WallSconce`); `hall-details/geometry.ts` holds the shared hooks (`bayPositions` / `useBayZ`, `useWallClearance`, …) and the **geometry budget** every module has to obey, because frames hang 0.23 m proud of the wall face with a 0.7 m clear margin at each wall end:
 
 - relief below the frame line stays within **0.11 m** proud; friezes and cornices above 2.6 m within **0.17 m**
-- freestanding masses only inside the **0.34 m corner pocket**; nothing under 2.6 m within 1.45 m of a wall centre (doorways)
+- freestanding masses only inside the **0.34 m corner pocket**; nothing under 2.6 m within **`DOOR_CLEAR_HALF` (1.45 m)** of a wall centre (doorways). Low `WallBand`s on back/front walls **auto-split** around that clear zone (`DOOR_CLEAR_Y` ≈ 2.55 m)
 - the end wall carries the hall title between **3.4 m and 3.9 m** — keep it clear
 - side-wall windows are placed at runtime between 2.4 m and 3.9 m, so panels, arches and roundels up there are filtered through **`useWallClearance`** (the hall passes its computed windows into `MovementHallDetails`)
 - at most **two added lights per hall**, so hall materials stay inside the WebGL light limits the shared track lighting already budgets for
 
+**Window styles:** `GalleryWindows.tsx` includes open `picture` lights and thin-steel `ribbon` bands. Movement styles must **not** use `factory` (barred) windows — regression: `server/__tests__/no-factory-windows.test.js`.
+
 Gothic surfaces include **`gothic-ashlar`** (full-storey blind arcade mapped once vertically via `metersPerRepeat === WALL_HEIGHT`), **`gothic-vault`** (quadripartite rib bay), and **`gothic-stone-floor`**. Door-flanking wall panels use the hall wall texture via `GalleryWall` `kind`/`tint` so they match the textured walls.
 
-### Wall brightness
+### Wall / floor brightness
 
-Halls are lit by a shared rig with a high brightness floor, so a pale wall tint clips to flat white and loses its texture. Two settings control this together, and they **multiply**:
+Halls are lit by a shared rig with a high brightness floor, so a pale wall tint clips to flat white and loses its texture. Two settings control wall brightness together, and they **multiply**:
 
 - **tints** — gallery walls are authored around **0.50–0.56** relative luminance (0.66 for the Suprematist and Pop white cubes, 0.15–0.27 for the deliberately dark halls). Nothing sits near white.
 - **`lightScale`** — Gothic **0.26**, Byzantine **0.30**, and every formerly pale interior **0.30**; the already-dark halls keep **1**. Window fills are not scaled, so daylight shafts stay bright.
 
+**Floor tints** are capped at relative luminance **≤ 0.58** so checker/marble floors do not blow out under the same rig (`server/__tests__/floor-brightness.test.js`).
+
 When a hall reads too bright, prefer `lightScale`: it keeps the material colour believable (Byzantine's warm stone is a genuine `#a89880`, simply lit dimly) and avoids greying tints toward neutral. Remember that dimming a hall dims its paintings too — the lighting is shared, with no per-painting spots.
 
-Wing layout (up to 55 works per wing, U-shaped hang, window gap placement with packed-wall **clerestory** fallback) lives in `client/src/utils/movementHallLayout.ts`. Visit order fills the **left wall** (first work at the entrance), then the **far/end wall**, then the **right** (last work at the entrance). The same hang applies to artist halls and guided tours. Hall lighting is **shared** (no per-painting spotlights) so `MeshStandardMaterial` walls stay within WebGL light limits — see [basics.md](basics.md) § Shared 3D behaviour. To change a movement’s look, edit its entry in `movement-interior-styles.ts` and rebuild the client.
+### Hang layout (wings, doors, columns)
+
+Wing layout lives in `client/src/utils/movementHallLayout.ts` (up to 55 works per wing, U-shaped hang, window gap placement with packed-wall **clerestory** fallback). Visit order fills the **left wall** (first work at the entrance), then the **far/end wall**, then the **right** (last work at the entrance). Multi-wing halls keep a centre exit on the far wall and hang only on the door flanks.
+
+**Paintings must not sit in front of mid-wall bay columns/pilasters.** Column Z centres use the same `bayPositions` formula as the period modules. Keep-out half-widths per `details` kind live in `client/src/utils/sideColumnKeepOuts.ts` (`SIDE_WALL_COLUMN_RHYTHMS`: gothic, roman, quattrocento, cinquecento, mannerist, neoclassical, gothic-revival, art-nouveau). Side-wall hang packs into the gaps between those keep-outs and **grows hall depth** when needed; columns are never moved. Windows also treat column keep-outs as occupied so they do not land on shafts. Regression: `server/__tests__/painting-column-clearance.test.js`.
+
+The same U-hang applies to artist halls and guided tours (artist halls have no period bay columns). Hall lighting is **shared** (no per-painting spotlights) so `MeshStandardMaterial` walls stay within WebGL light limits — see [basics.md](basics.md) § Shared 3D behaviour. To change a movement’s look, edit its entry in `movement-interior-styles.ts` and rebuild the client.
 
 ## Historical event markers (frontend timeline)