Reinforced wall as roughly hewn stone in both styles (high-res with five variants)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

art/generated/textures/PROMPTS.md

@@ -101,3 +101,24 @@ python3 tools/make_tile.py <name>-raw.png <name> --size 128 --colors 32 --band 1
 
 `<name>-v64.png` / `<name>-v128.png` are copied to `assets/textures/`; `<name>-v128-preview.png`
 shows a floor laid out at random. Water and lava keep their 2x2 blocks (they flow).
+
+## Reinforced wall (2026-11-07)
+
+Roughly hewn stone instead of bricks. `fal-ai/flux-2-pro` (`square_hd`, `seed: 4244`), the
+sentence followed by the shared style text:
+
+```text
+A uniform all-over pattern of a fortified dungeon wall seen straight on: roughly hewn, irregular grey stone blocks of clearly different sizes and shapes, chiselled rough faces with tool marks and chipped edges, fitted tightly with thin dark mortar that has a faint dark-crimson tint, very solid and heavy - not bricks, not a regular brick pattern, no frame, evenly spread from edge to edge.
+```
+
+The stones came out small, so the middle of the picture (pixels 100-500) is used:
+
+```bash
+python3 -I -c "from PIL import Image; Image.open('reinforced-raw.png').crop((100,100,500,500)).save('/tmp/reinf-zoom.png')"
+python3 tools/make_tile.py /tmp/reinf-zoom.png reinforced --size 256 --colors 32 --band 28 --variants 5 --bright 1.25
+python3 tools/make_tile.py /tmp/reinf-zoom.png reinforced --size 128 --colors 24 --band 14 --variants 5 --bright 1.25
+```
+
+The pixel-art atlas (16x16) does not use the picture (scaled that small it turns to mush): its
+reinforced wall is drawn in code in the same spirit (`T_REINF` in `gen_atlas`: rubble stones
+around a jittered grid, crimson-tinted mortar).