Furniture materials: wood, stone, iron, cloth, straw, fur, book spines and spellbook pages in both styles

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

art/generated/textures/materials/PROMPTS.md

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+# Furniture materials (2026-11-07)
+
+Textures for the furniture boxes of `src/props.rs` (`Mat`, `mc`): every box of a material gets the
+texture on all sides, tinted by the box's own colour, so the furniture keeps its colours and gains
+detail (book spines with titles, a spellbook page with script, straw dummies, wood grain, ...).
+
+`fal-ai/flux-2-pro`, `image_size: square_hd`, `seed: 4400`; the material's sentence followed by:
+
+```text
+Square texture seen straight on, flat even lighting, no shadows, no vignette, no border, no text unless asked. Hand-painted pixel art style for a dark-fantasy dungeon strategy game: chunky clear shapes, crisp edges, readable at small size. Fills the whole image.
+```
+
+## wood
+
+```text
+Light weathered wooden planks running vertically with clear wood grain, knots and a few nail heads, in light neutral beige tones.
+```
+
+## stone
+
+```text
+A rough block of light grey stone with chisel marks, small pits and a few fine cracks, in light neutral grey tones.
+```
+
+## iron
+
+```text
+Light grey forged iron with hammer dents, scratches and a few rivets near the edges, in light neutral grey tones.
+```
+
+## cloth
+
+```text
+Woven fabric with a visible coarse weave, soft folds and a simple embroidered border near the edges, in light neutral off-white tones.
+```
+
+## straw
+
+```text
+Bundled straw and sackcloth: coarse burlap with straw sticking out, stitched seams, in light neutral beige tones.
+```
+
+## fur
+
+```text
+Thick shaggy animal fur with tufts and strands, in light neutral beige-grey tones.
+```
+
+## book
+
+```text
+The spine of one old leather-bound book standing upright, filling the whole image: two raised bands near the top and the bottom, a gilded frame and a short line of golden title letters in the middle, worn leather, in light neutral tones.
+```
+
+## paper
+
+```text
+An open page of an old spellbook filling the whole image: yellowed parchment with many lines of dark handwritten script, a small drawn magic circle and a red initial letter, in light neutral tones.
+```
+
+## Processing
+
+`tools/make_material.py` crops (stone and the book lay on white), turns the picture into grey
+detail with a mean brightness of 0.8 (the page keeps its colours) and scales to 64x64 (high-res)
+and 16x16 (pixel art):
+
+```bash
+T=tools/make_material.py
+python3 $T wood-raw.png wood
+python3 $T stone-raw.png stone --crop 0.15,0.15,0.75,0.6
+python3 $T iron-raw.png iron --crop 0.1,0.1,0.9,0.9
+python3 $T cloth-raw.png cloth --crop 0.12,0.12,0.88,0.88 --mean 0.85
+python3 $T straw-raw.png straw --crop 0.05,0.05,0.95,0.95
+python3 $T fur-raw.png fur
+python3 $T book-raw.png book --trim --mean 0.75
+python3 $T paper-raw.png paper --color --crop 0.04,0.04,0.96,0.96 --mean 0.8
+```
+
+Copied to `assets/textures/mat/`.