Fix movement-hall black walls and column clipping.

Cap shared hall lights (no per-painting spots) so MeshStandard walls stay within WebGL limits, tuck classical/neoclassical details into engaged corner pilasters, and document the light budget.

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

client/src/utils/galleryProceduralTextures.ts

@@ -583,7 +583,7 @@ function imageDataToNormalMap(data: ImageData, size: number, strength = 2.5): Im
   return out;
 }
 
-function imageDataToTexture(data: ImageData): THREE.CanvasTexture {
+function imageDataToTexture(data: ImageData, colorSpace: THREE.ColorSpace): THREE.CanvasTexture {
   const canvas = document.createElement('canvas');
   canvas.width = data.width;
   canvas.height = data.height;
@@ -591,8 +591,8 @@ function imageDataToTexture(data: ImageData): THREE.CanvasTexture {
   const tex = new THREE.CanvasTexture(canvas);
   tex.wrapS = THREE.RepeatWrapping;
   tex.wrapT = THREE.RepeatWrapping;
-  tex.colorSpace = THREE.SRGBColorSpace;
-  tex.anisotropy = 16;
+  tex.colorSpace = colorSpace;
+  tex.anisotropy = 8;
   return tex;
 }
 
@@ -686,8 +686,9 @@ export function getSurfaceTexture(kind: SurfaceTextureKind): SurfaceTextureSet {
   const normalData = imageDataToNormalMap(colorData, TEXTURE_SIZE, normalStrengthFor(kind));
 
   const set: SurfaceTextureSet = {
-    map: imageDataToTexture(colorData),
-    normalMap: imageDataToTexture(normalData),
+    map: imageDataToTexture(colorData, THREE.SRGBColorSpace),
+    // Normal maps must stay linear — sRGB encoding breaks lighting on walls.
+    normalMap: imageDataToTexture(normalData, THREE.NoColorSpace),
     roughness: ROUGHNESS[kind] ?? 0.75,
     metalness: METALNESS[kind] ?? 0.04,
     metersPerRepeat: METERS[kind] ?? 2.8,