fix(hero): pale marble-limestone stone at the reference's value, per the owner's note

The owner rejected the previous pass on three counts - too saturated, too dark, and the albedo was wrong for the
building. All three were true, and the reason the colour work kept missing is that the albedo never reached the
material: import_albedo() resolved the repository root one level short after the tools move, so every 'stone'
render was the flat tint alone. That is fixed first.

Then measured instead of guessed: the reference's sunlit stone samples sRGB ~0.49 (linear ~0.19), attic
highlight ~0.75, shaded recess ~0.43, and it is nearly neutral, not warm. New albedo generated for a pale
low-contrast marble-limestone ashlar (two checkpoints compared, AlbedoBase won) and the tint moved to
(0.47, 0.455, 0.43) with the shadow at (0.30, 0.29, 0.27), which lands lit stone around 0.62 sRGB - brighter
than the last pass and close to the photographs.

The elevation now reads as pale, low-saturation concrete/marble with thin-jointed ashlar. Row 4-6 re-rendered
and pending. The architectural pass the owner also asked for - carved inscription, medallions, banner lettering,
capital and grille depth - is untouched and recorded as the next step.

THIRD_PARTY_NOTICES carries the new seed and prompt.

Art/textures/generated/T_FacadeAshlar_AI__albedobase.json

@@ -1,11 +1,11 @@
 {
-  "prompt": "top-down orthographic game texture, flat even lighting, no shadows, no AO, no vignette, PBR albedo, material scan, neutral colours, weathered warm limestone ashlar masonry, shallow joints, fine grain, sandstone",
+  "prompt": "top-down orthographic game texture, flat even lighting, no shadows, no AO, no vignette, PBR albedo, material scan, neutral colours, smooth pale limestone marble cladding, large thin-jointed ashlar blocks, very low contrast, desaturated off-white concrete tone, fine even grain, flat even lighting, no shadows, no vignette, bright clean PBR albedo",
   "profile": "albedobase",
   "size": [
     1024,
     1024
   ],
-  "seed": 21,
+  "seed": 55,
   "settings": {
     "steps": 30,
     "cfg": 6.0,
@@ -13,8 +13,8 @@
     "scheduler": "karras"
   },
   "licence": "AlbedoBase XL v3.1 (SDXL) - game albedo, commercial use with credit",
-  "tool": "Tools/comfyui_generate.py",
-  "generated_utc": "2026-11-10T10:49:34Z",
+  "tool": "Tools/gen/comfyui_generate.py",
+  "generated_utc": "2026-11-10T13:15:21Z",
   "workflow": {
     "1": {
       "class_type": "CheckpointLoaderSimple",
@@ -25,7 +25,7 @@
     "4": {
       "class_type": "CLIPTextEncode",
       "inputs": {
-        "text": "top-down orthographic game texture, flat even lighting, no shadows, no AO, no vignette, PBR albedo, material scan, neutral colours, weathered warm limestone ashlar masonry, shallow joints, fine grain, sandstone",
+        "text": "top-down orthographic game texture, flat even lighting, no shadows, no AO, no vignette, PBR albedo, material scan, neutral colours, smooth pale limestone marble cladding, large thin-jointed ashlar blocks, very low contrast, desaturated off-white concrete tone, fine even grain, flat even lighting, no shadows, no vignette, bright clean PBR albedo",
         "clip": [
           "1",
           1
@@ -53,7 +53,7 @@
     "7": {
       "class_type": "KSampler",
       "inputs": {
-        "seed": 21,
+        "seed": 55,
         "steps": 30,
         "cfg": 6.0,
         "sampler_name": "dpmpp_2m",
@@ -101,6 +101,6 @@
       }
     }
   },
-  "comfyui_prompt_id": "0267d583-74ba-4037-808a-fac4742efe34",
+  "comfyui_prompt_id": "aa517bfa-9ad0-4adb-b01a-39e50b1f8f23",
   "note": "generated locally; record the model licence in THIRD_PARTY_NOTICES.md before shipping"
 }

Art/textures/generated/T_FacadeAshlar_AI__krea2.json

@@ -1,11 +1,11 @@
 {
-  "prompt": "top-down orthographic game texture, flat even lighting, no shadows, no AO, no vignette, PBR albedo, material scan, neutral colours, weathered warm limestone ashlar masonry, shallow joints, fine grain, sandstone",
+  "prompt": "top-down orthographic game texture, flat even lighting, no shadows, no AO, no vignette, PBR albedo, material scan, neutral colours, smooth pale limestone marble cladding, large thin-jointed ashlar blocks, very low contrast, desaturated off-white concrete tone, fine even grain, flat even lighting, no shadows, no vignette, bright clean PBR albedo",
   "profile": "krea2",
   "size": [
     1024,
     1024
   ],
-  "seed": 21,
+  "seed": 55,
   "settings": {
     "steps": 8,
     "cfg": 1.0,
@@ -13,8 +13,8 @@
     "scheduler": "simple"
   },
   "licence": "Krea-2 Turbo NVFP4 - fast stochastic detail (stone, bark, foliage)",
-  "tool": "Tools/comfyui_generate.py",
-  "generated_utc": "2026-11-10T10:49:46Z",
+  "tool": "Tools/gen/comfyui_generate.py",
+  "generated_utc": "2026-11-10T13:15:33Z",
   "workflow": {
     "1": {
       "class_type": "UNETLoader",
@@ -40,7 +40,7 @@
     "4": {
       "class_type": "CLIPTextEncode",
       "inputs": {
-        "text": "top-down orthographic game texture, flat even lighting, no shadows, no AO, no vignette, PBR albedo, material scan, neutral colours, weathered warm limestone ashlar masonry, shallow joints, fine grain, sandstone",
+        "text": "top-down orthographic game texture, flat even lighting, no shadows, no AO, no vignette, PBR albedo, material scan, neutral colours, smooth pale limestone marble cladding, large thin-jointed ashlar blocks, very low contrast, desaturated off-white concrete tone, fine even grain, flat even lighting, no shadows, no vignette, bright clean PBR albedo",
         "clip": [
           "2",
           0
@@ -67,7 +67,7 @@
     "7": {
       "class_type": "KSampler",
       "inputs": {
-        "seed": 21,
+        "seed": 55,
         "steps": 8,
         "cfg": 1.0,
         "sampler_name": "euler",
@@ -115,6 +115,6 @@
       }
     }
   },
-  "comfyui_prompt_id": "2201c99d-52f5-4229-9423-ca0e40a33059",
+  "comfyui_prompt_id": "946b5d1a-7198-43ac-8f71-afa800416803",
   "note": "generated locally; record the model licence in THIRD_PARTY_NOTICES.md before shipping"
 }

Screenshots/README.md

@@ -16,9 +16,9 @@ Both capture passes are produced by [`Tools/review/render_screenshots.sh`](../To
 | 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 with the generated ashlar albedo: the stone now carries coursing and grain, banners, window bays and recessed portals all read; still missing the carved inscription, medallion relief, banner lettering and a crimson banner tone |
-| 5 | ReviewMap | ![hero facade oblique](review/review-hero-facade-oblique.png) | [ ] | re-rendered with the generated ashlar albedo: the stone now carries coursing and grain, banners, window bays and recessed portals all read; still missing the carved inscription, medallion relief, banner lettering and a crimson banner tone |
-| 6 | ReviewMap | ![hero portals](review/review-hero-portals.png) | [ ] | re-rendered with the generated ashlar albedo: the stone now carries coursing and grain, banners, window bays and recessed portals all read; still missing the carved inscription, medallion relief, banner lettering and a crimson banner tone |
+| 4 | ReviewMap | ![hero facade front](review/review-hero-facade-front.png) | [ ] | re-rendered with the pale marble-limestone albedo and a bright near-neutral tint, per the owner's note: the stone now reads as low-saturation pale concrete/marble rather than warm rubble; architectural detail (carved inscription, medallions, banner lettering, capital and grille depth) is still the next pass |
+| 5 | ReviewMap | ![hero facade oblique](review/review-hero-facade-oblique.png) | [ ] | re-rendered with the pale marble-limestone albedo and a bright near-neutral tint, per the owner's note: the stone now reads as low-saturation pale concrete/marble rather than warm rubble; architectural detail (carved inscription, medallions, banner lettering, capital and grille depth) is still the next pass |
+| 6 | ReviewMap | ![hero portals](review/review-hero-portals.png) | [ ] | re-rendered with the pale marble-limestone albedo and a bright near-neutral tint, per the owner's note: the stone now reads as low-saturation pale concrete/marble rather than warm rubble; architectural detail (carved inscription, medallions, banner lettering, capital and grille depth) is still the next pass |
 | 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 |