Generated gear parts (helmet, shoulder pieces, crown, cape, horns, plume) instead of drawn shapes

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

.gitignore

@@ -5,3 +5,9 @@ www/dungeoncraft.wasm
 www/mq_js_bundle.js
 play/
 dist/
+art/generated/creature-previews/
+art/generated/sprites/*-raw*.png
+art/generated/sprites/anim/*-raw*.png
+art/generated/sprites/scripts/__pycache__/
+art/generated/portraits/*-raw*.png
+art/generated/portraits/scripts/__pycache__/

Cargo.toml

@@ -18,6 +18,14 @@ codegen-units = 1
 [profile.dev]
 opt-level = 1
 
+# desktop builds (tools/build_desktop.py): optimised like release, but compiled on all cores
+# (several codegen units, thin LTO); release keeps one unit and full LTO for the smallest,
+# fastest WASM
+[profile.desktop]
+inherits = "release"
+lto = "thin"
+codegen-units = 16
+
 # desktop builds: system file dialog (xdg portal on Linux) and sound output
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 rfd = { version = "0.17", default-features = false, features = ["xdg-portal"] }

VERSION

@@ -1 +1 @@
-v202611-00076
+v202611-00077

art/generated/gear/PROMPTS.md

@@ -0,0 +1,12 @@
+# Gear parts (high-res)
+
+The parts laid over the detailed sprites as their gear (helmet, shoulder piece, crown, cape,
+horn, plume; `GEAR_*` and `gen_gear` in `src/gfx.rs`). Generated on 2026-11-08 with
+`fal-ai/nano-banana-pro` (`aspect_ratio: 3:2`, `resolution: 2K`, one image), the prompt in
+`batch.py`: six pieces in light neutral grey on magenta, so the game tints them (bronze, steel,
+gold; the cape red for creatures, blue for heroes).
+
+Processing (inline python, see the session): magenta keyed out, every piece cropped to its
+picture, the horn mirrored, turned into light grey (luminance x 1.25), scaled to its place in the
+gear texture (the old rects times four: helmet 96x48, shoulder 48x36, crown 80x40, cape 112x160,
+horn 28x40, plume 28x48) with hard alpha; copied to `assets/textures/gear/<part>.png`.

art/generated/gear/batch.py

@@ -0,0 +1,12 @@
+# The gear parts laid over the detailed sprites (src/gfx.rs GEAR_*), 2026-11-08: one sheet,
+# light neutral grey so the game tints them (bronze, steel, gold; the cape red or blue).
+PROMPT = ("A sheet of six separate equipment pieces for a dark-fantasy pixel-art game, arranged in a grid of 3 columns and 2 rows, each piece centred "
+          "in its own cell and filling most of it, all in the same style: hand-painted pixel art, crisp edges, a dark near-black outline, shading lit "
+          "from the upper left, and every piece in LIGHT NEUTRAL GREY tones only (no other colours), so it can be tinted later. The background is a "
+          "completely flat pure magenta (#FF00FF) everywhere - no frames, no grid lines, no text. The pieces, in reading order: "
+          "1. a round metal helmet seen from the front, a dome with a riveted rim, no face, no visor; "
+          "2. a single rounded shoulder plate (pauldron) seen from the front, with two rivets; "
+          "3. a crown with three pointed spikes and small round gems; "
+          "4. a long cape seen from behind, hanging down, wider at the hem, with folds; "
+          "5. a single curved horn pointing up, slightly bent to the right; "
+          "6. a feather plume, a tall bushy crest.")

art/generated/icons/PROMPTS.md

@@ -0,0 +1,66 @@
+# Interface icons (high-res)
+
+Generated on 2026-11-07 with `fal-ai/nano-banana-pro` (`resolution: 2K`, one image per sheet,
+`aspect_ratio: 21:9` for the 5-column sheets, `16:9` for the spells). `batch.py` holds the
+prompts: the shared text below followed by the numbered icon descriptions.
+
+```text
+A sheet of game icons for a dark-fantasy dungeon strategy game, arranged in a grid of {cols} columns and {rows} rows, every icon centred in its own equal square cell and filling about 80 percent of it, all icons the same size and in the same style: hand-painted pixel art, chunky clear shapes, crisp edges, a dark near-black outline, rich but slightly muted colours, readable at small size, light from the upper left. The background is a completely flat pure magenta (#FF00FF) everywhere, also between the icons - no frames, no grid lines, no cell borders, no text, no labels, no numbers. The icons, in reading order (left to right, top to bottom): 
+```
+
+## tools (5x2)
+
+- `I_PICK`: a pickaxe for digging
+- `I_HAND`: a clawed green monster hand reaching to grab
+- `I_SELL`: a small pile of gold coins with a curved arrow (selling)
+- `I_FLAG`: a red rally flag on a pole
+- `I_BOLT`: a yellow lightning bolt
+- `I_HEAL`: a glowing green healing cross with sparkles
+- `I_SUMMON`: a glowing violet summoning circle with a small imp silhouette
+- `I_BRIDGE`: a small wooden plank bridge arch
+- `I_WALL`: a block of grey stone wall with an upward arrow
+- `I_STEEL`: a riveted dark steel wall plate
+
+## towers (5x2)
+
+- `I_ARROW`: a small wooden watchtower with an arrow
+- `I_CANNON`: a squat stone tower with a black cannon
+- `I_MAGIC`: a slender dark tower with a glowing purple orb on top
+- `I_RUNE`: a dark stone obelisk with a glowing red rune and bronze bands
+- `I_DRAWBRIDGE`: a raised wooden drawbridge with chains over water
+- `I_RAM`: a battering ram: a tree trunk with an iron cap under a small wooden roof on wheels
+- `I_CATAPULT`: a wooden catapult with a stone in its arm
+- `I_ORDERS`: two crossed swords (attack order)
+- `I_ORDERS+1`: a round shield (guard order)
+- `I_FREEZE`: a glowing pale-blue snowflake (frost spell)
+
+## traps (5x2)
+
+- `I_TRAPS`: a floor trap with sharp metal spikes
+- `I_TRAPS+1`: a floor vent puffing a green poison cloud
+- `I_TRAPS+2`: a floor nozzle shooting a jet of fire
+- `I_TRAPS+3`: a big round rolling boulder
+- `I_TRAPS+4`: a brass alarm bell
+- `I_TRAPS+5`: a glowing red rune mine on the floor
+- `I_TRAPS+6`: a floor trap with a glowing blue frost crystal
+- `I_TRAPS+7`: a wooden door with iron hinges
+- `I_TRAPS+8`: a heavy iron door with rivets
+- `I_TRAPS+9`: a magic door glowing with purple runes
+
+## spells (4x2)
+
+- `I_SPELLS`: a glowing all-seeing eye (seer's eye spell)
+- `I_SPELLS+1`: falling rocks from a cracked ceiling (cave-in spell)
+- `I_SPELLS+2`: a winged boot (haste spell)
+- `I_SPELLS+3`: a fist of grey stone (stoneskin spell)
+- `I_SPELLS+4`: gold coins raining down (gold rain spell)
+- `I_SPELLS+5`: a fading translucent ghostly figure (invisibility spell)
+- `I_SPELLS+6`: a green skull in a sickly cloud (plague spell)
+- `I_SPELLS+7`: cracked shaking ground with rocks jumping (quake spell)
+
+## Processing
+
+`tools/cut_icons.py <sheet>-raw.png <sheet> --grid 2x5` (spells `--grid 2x4`) keys out only nearly
+pure magenta (violet glows stay), crops every icon, centres it in a square and scales it to 64x64
+and 128x128 with hard alpha. The strips go to `assets/textures/icons/`; the game puts them into
+the high-res atlases' icon cells (`HD_ICONS` in `src/gfx.rs`).

art/generated/icons/batch.py

@@ -0,0 +1,29 @@
+# The interface icons of the high-res style (2026-11-07): four sheets, each a grid of icons.
+# (sheet name, columns, rows, [(atlas cell constant, description)])
+STYLE = ("A sheet of game icons for a dark-fantasy dungeon strategy game, arranged in a grid of {cols} columns and {rows} rows, every icon "
+         "centred in its own equal square cell and filling about 80 percent of it, all icons the same size and in the same style: "
+         "hand-painted pixel art, chunky clear shapes, crisp edges, a dark near-black outline, rich but slightly muted colours, readable at small size, "
+         "light from the upper left. The background is a completely flat pure magenta (#FF00FF) everywhere, also between the icons - "
+         "no frames, no grid lines, no cell borders, no text, no labels, no numbers. The icons, in reading order (left to right, top to bottom): ")
+SHEETS = [
+ ("tools", 5, 2, [
+  ("I_PICK", "a pickaxe for digging"), ("I_HAND", "a clawed green monster hand reaching to grab"), ("I_SELL", "a small pile of gold coins with a curved arrow (selling)"),
+  ("I_FLAG", "a red rally flag on a pole"), ("I_BOLT", "a yellow lightning bolt"), ("I_HEAL", "a glowing green healing cross with sparkles"),
+  ("I_SUMMON", "a glowing violet summoning circle with a small imp silhouette"), ("I_BRIDGE", "a small wooden plank bridge arch"),
+  ("I_WALL", "a block of grey stone wall with an upward arrow"), ("I_STEEL", "a riveted dark steel wall plate")]),
+ ("towers", 5, 2, [
+  ("I_ARROW", "a small wooden watchtower with an arrow"), ("I_CANNON", "a squat stone tower with a black cannon"), ("I_MAGIC", "a slender dark tower with a glowing purple orb on top"),
+  ("I_RUNE", "a dark stone obelisk with a glowing red rune and bronze bands"), ("I_DRAWBRIDGE", "a raised wooden drawbridge with chains over water"),
+  ("I_RAM", "a battering ram: a tree trunk with an iron cap under a small wooden roof on wheels"), ("I_CATAPULT", "a wooden catapult with a stone in its arm"),
+  ("I_ORDERS", "two crossed swords (attack order)"), ("I_ORDERS+1", "a round shield (guard order)"), ("I_FREEZE", "a glowing pale-blue snowflake (frost spell)")]),
+ ("traps", 5, 2, [
+  ("I_TRAPS", "a floor trap with sharp metal spikes"), ("I_TRAPS+1", "a floor vent puffing a green poison cloud"), ("I_TRAPS+2", "a floor nozzle shooting a jet of fire"),
+  ("I_TRAPS+3", "a big round rolling boulder"), ("I_TRAPS+4", "a brass alarm bell"), ("I_TRAPS+5", "a glowing red rune mine on the floor"),
+  ("I_TRAPS+6", "a floor trap with a glowing blue frost crystal"), ("I_TRAPS+7", "a wooden door with iron hinges"), ("I_TRAPS+8", "a heavy iron door with rivets"),
+  ("I_TRAPS+9", "a magic door glowing with purple runes")]),
+ ("spells", 4, 2, [
+  ("I_SPELLS", "a glowing all-seeing eye (seer's eye spell)"), ("I_SPELLS+1", "falling rocks from a cracked ceiling (cave-in spell)"),
+  ("I_SPELLS+2", "a winged boot (haste spell)"), ("I_SPELLS+3", "a fist of grey stone (stoneskin spell)"), ("I_SPELLS+4", "gold coins raining down (gold rain spell)"),
+  ("I_SPELLS+5", "a fading translucent ghostly figure (invisibility spell)"), ("I_SPELLS+6", "a green skull in a sickly cloud (plague spell)"),
+  ("I_SPELLS+7", "cracked shaking ground with rocks jumping (quake spell)")]),
+]

art/generated/imp-sprite/PROMPTS.md

@@ -0,0 +1,125 @@
+# Pit Imp - generated pixel sprite (test for bigger sprites)
+
+Generated on 2026-11-07 with fal.ai, as a test whether creature sprites bigger than the current
+10x10 can come from an image model. The description follows the game's imp (`EK::Worker`,
+`sprite_rows` in `src/gfx.rs`): orange skin, black outline, yellow eyes, dark-red tunic, pickaxe.
+
+## Step 1: sprite sheet
+
+- Model: `fal-ai/nano-banana-pro`
+- Settings: `aspect_ratio: 21:9`, `resolution: 2K`, `num_images: 2`, `output_format: png`
+- Results: `raw-1.png` (used: the lower row, compact chibi proportions), `raw-2.png` (more
+  detailed, too fine for small sprites)
+
+Prompt:
+
+```text
+Pixel art sprite sheet for a dark-fantasy dungeon strategy game: the "Pit Imp", a small goblin-like worker demon. One single character shown five times in one horizontal row, evenly spaced, same size, same pose (standing, idle), each view in its own equal cell:
+1. front view, facing the viewer
+2. front three-quarter view, turned to the right
+3. side view, facing right
+4. back three-quarter view, turned away to the right
+5. back view
+
+The imp: short and stocky, big head, oversized pointed ears and two small black horns, orange skin, glowing yellow eyes, a wide mischievous grin with tiny fangs, a ragged dark-red tunic with a rope belt, bare feet with claws, carrying a small iron pickaxe with a wooden handle over its right shoulder. Thin tail.
+
+Style: crisp retro pixel art at about 32x32 pixels per character, scaled up with hard square pixels, a one-pixel near-black outline around the figure, limited palette of about 12 colours, flat shading with one highlight and one shadow tone, no anti-aliasing, no gradients, no blur. Flat pure magenta background (#FF00FF) everywhere, no ground, no shadows, no text, no labels, no grid lines.
+```
+
+## Step 2: pixel grid and palette
+
+`tools/pixelize_sprite.py` (needs Pillow) removes the magenta background, cuts out the five
+views, samples them down to a fixed grid (one scale for all views, standing on the bottom) and
+reduces them to one shared palette:
+
+```bash
+python3 tools/pixelize_sprite.py raw-1.png imp --views 5 --size 32 --colors 16 --crop 0,0.27,1,0.72
+```
+
+Result: `imp-32.png` (views front, front 3/4, side, back 3/4, back; transparent) and the 8x
+preview `imp-32-preview.png` (a 24x24 test lost most of the face and was dropped). The final
+idle sheet was made again with the body scale of the animation (see below).
+
+## Findings
+
+- 32x32 keeps the face (eyes, grin) and the silhouette readable; 24x24 already loses most of the face.
+- The pickaxe's iron mostly turns dark; small details would need a manual touch-up.
+- In the high-res graphics style the game uses `imp-32.png` (idle) and `imp-hack-32.png` (digging).
+
+## Digging animation (2026-11-07)
+
+Four frames per view (wind-up, swing, impact, recover), made with `fal-ai/nano-banana-pro/edit`
+(`resolution: 2K`, `num_images: 2`, `output_format: png`).
+
+1. Front, front three-quarter and side: reference image = the lower row of `raw-1.png` (scaled
+   to half size), `aspect_ratio: 4:5`. Used: `hack-raw-1.png`, rows 1-3 (its rows 4-5 showed
+   the front instead of the back in some frames; the second result was dropped).
+
+```text
+The attached image is a pixel art sprite sheet of the "Pit Imp" in five views (left to right: front, front three-quarter turned right, side facing right, back three-quarter turned away to the right, back).
+
+Create a new pixel art sprite sheet of exactly the same character - same proportions, colours, outline, pixel size, tunic, horns, ears, tail and the same small iron pickaxe - showing a looping digging animation: the imp swings the pickaxe with both hands and hacks at a rock wall in front of it (the wall itself is not shown).
+
+Layout: a grid of 5 rows and 4 columns, every figure the same size, evenly spaced, each in its own equal cell, all standing on the same baseline within their row.
+Rows (one view per row, top to bottom): 1 front view facing the viewer, 2 front three-quarter view turned to the right, 3 side view facing right, 4 back three-quarter view turned away to the right, 5 back view.
+Columns (animation frames, left to right): 1 wind-up - the pickaxe raised high above and behind the head, body leaning back; 2 swing - the pickaxe coming down over the head, body leaning forward; 3 impact - the pickaxe head struck down low in front of the body at knee height, body bent forward, a few small rock chips flying; 4 recover - pulling the pickaxe back up at chest height, body upright.
+The feet stay in place in all four frames; only arms, pickaxe, head and upper body move.
+
+Style: identical to the attached sheet - crisp retro pixel art, hard square pixels, one-pixel near-black outline, limited palette, no anti-aliasing, no blur. Flat pure magenta background (#FF00FF) everywhere, no ground, no shadows, no text, no labels, no frame lines, no grid lines.
+```
+
+2. Back three-quarter and back: reference images = the idle sheet and the upper three rows of
+   `hack-raw-1.png`, `aspect_ratio: 16:9`. Used: `hack-back-raw-2.png` (the first result
+   was dropped).
+
+```text
+The first attached image is a pixel art sprite sheet of the "Pit Imp" in five idle views (front, front three-quarter, side, back three-quarter, back). The second attached image shows the same imp's digging animation (columns: 1 wind-up with the pickaxe raised high above and behind the head, 2 swing with the pickaxe coming down over the head, 3 impact with the pickaxe struck down low in front of the body with rock chips, 4 recover with the pickaxe pulled back up at chest height) for the front, front three-quarter and side views.
+
+Create the same four-frame digging animation for the two views seen FROM BEHIND, where the imp faces away from the viewer and we see the back of its head, its back, the tunic from behind and the tail; the face and eyes are never visible:
+Row 1: back three-quarter view, the imp turned away from the viewer towards the upper right, hacking at a wall in front of it (away from the viewer).
+Row 2: back view, the imp seen straight from behind, hacking at a wall in front of it (away from the viewer).
+Columns (frames, left to right): 1 wind-up - pickaxe raised high above the head, its head visible above the imp's head; 2 swing - pickaxe coming down, partly hidden by the head; 3 impact - the pickaxe is in front of the imp and mostly hidden by its body, only the tip shows low at one side, a few rock chips fly up beside the body; 4 recover - pickaxe pulled back up at shoulder height, its handle visible beside the body.
+The feet stay in place in all frames.
+
+Layout: a grid of exactly 2 rows and 4 columns, every figure the same size and the same character size as in the attached sheets, evenly spaced, each in its own equal cell, all standing on the same baseline.
+Style: identical to the attached sheets - same character, proportions, colours, outline and pixel size, crisp retro pixel art, hard square pixels, no anti-aliasing, no blur. Flat pure magenta background (#FF00FF) everywhere, no ground, no shadows, no text, no labels, no frame lines, no grid lines.
+```
+
+### Pixel grid
+
+All sheets of the imp share one body scale (horns to feet = 30 pixels, measured with
+`--measure` on a frame where the pickaxe is below the horns), the feet row 31 and the idle
+sheet's palette plus two iron greys:
+
+```bash
+T=tools/pixelize_sprite.py
+python3 $T raw-1.png imp --views 5 --size 32 --colors 16 --crop 0,0.27,1,0.72 --step 18.43 --feet 31
+# per view row of the hack sheets (body heights 438, 441, 399 / 664, 653 source pixels):
+python3 $T hack-raw-1.png row0 --grid 1x4 --size 32 --crop 0,0,1,0.2 --step 14.6 --feet 31 \
+    --palette imp-32.png --add-colors "150,152,168;104,106,122" --outline-weight 0.6
+# ... rows 1-2 of hack-raw-1.png, rows 0-1 of hack-back-raw-2.png likewise,
+# then the five rows stacked into imp-hack-32.png (4 frames x 5 views)
+```
+
+`imp-hack-32-preview.png`: the frames, the idle views in the right column for comparison.
+The game copies `imp-32.png` and `imp-hack-32.png` to `assets/sprites/`.
+
+### Sack
+
+The gold sack is not generated: it is a small hand-made pixel pattern (`SACK_HD`, `SACK_SMALL`
+in `src/gfx.rs`) that the game places on every frame when the atlas is built.
+
+## 64x64 (2026-11-07)
+
+The high-res style shows the imp in 64x64 when close and in 32x32 at the normal zoom (both from
+the same raw sheets; a 64x64 sprite shown smaller would lose pixels and flicker). The 64x64
+sheets use the body scale 60 pixels, the feet row 63, 24 colours plus the iron greys:
+
+```bash
+python3 $T raw-1.png imp --views 5 --size 64 --colors 24 --crop 0,0.27,1,0.72 --step 9.217 --feet 63 \
+    --add-colors "150,152,168;104,106,122"
+# hack rows: --size 64 --step <body height>/60 --feet 63 --palette imp-64.png --outline-weight 0.6
+```
+
+Results: `imp-64.png`, `imp-hack-64.png`, preview `imp-hack-64-preview.png` (idle views in the
+right column). The game copies them to `assets/sprites/`.

art/generated/portraits/PROMPTS.md

@@ -0,0 +1,62 @@
+# Bestiary portraits (fal.ai)
+
+Generated on 2026-11-07/08: one portrait per creature kind (the 30 of
+`../sprites/manifest.json` plus the imp, `EK::Worker`) for the bestiary in the high-res style.
+Bust (head and shoulders; head and front body for beasts, the machine for the siege engines),
+three-quarter view, torch light from one side, dark dungeon wall behind.
+
+- `<id>-raw.png`: the model output, 1024x1024 (local only, ignored by git).
+- `<id>-128.png`: the processed 128x128 pixel-art portrait (48 colours, opaque).
+- `../../../assets/portraits/portraits.png`: all 31 in one atlas, 8 columns x 4 rows of 128x128,
+  in the order of `../../../assets/portraits/order.txt` (`EK` names; mirrored by `ORDER` in
+  `src/portraits.rs`, a test checks both agree).
+
+## Generation
+
+- Model: `fal-ai/nano-banana-pro/edit` (POST https://fal.run/fal-ai/nano-banana-pro/edit)
+- `aspect_ratio: 1:1`, `resolution: 1K`, `num_images: 1`, `output_format: png`
+- Reference image (`image_urls`, data URI): the front and front three-quarter view of the
+  creature's idle sheet `../sprites/<id>-64.png` (the imp: `assets/sprites/imp-64.png`),
+  scaled 6x nearest onto a flat dark grey (768x384).
+- 31 images, no retries (every one showed the right character, no text). About $4.65.
+- Scripts in `scripts/`: `portraits.py` (descriptions taken from
+  `../sprites/scripts/creatures.py` plus the imp, framing per kind, prompt template), `gen.py`
+  (requests, 4 at a time; reads the key from `~/.config/dungeoncraft/fal-key`), `process.py`.
+- The first two (knight, spider) were sent before "(the torch itself outside the picture)" was
+  added; they show a torch.
+
+### Prompt template
+
+`{thing}` is `character`, `creature` (beasts: spider, bat, owl, wyrm, beetle, cavebear,
+gargoyle) or `siege engine` (ram, catapult); `{framing}` is `a head-and-shoulders bust
+portrait`, `a close-up of its head and the front of its body (bust portrait)` or `a close-up of
+the front part of the machine with its crew-less wooden frame and iron parts`.
+
+```text
+The attached image shows a small pixel art game sprite of the "{name}" (left: front view, right: three-quarter view). {desc}
+
+Paint a PORTRAIT of exactly this {thing} for the illustrated monster compendium of a dark-fantasy dungeon strategy game: {framing}, three-quarter view turned slightly to the side, looking at the viewer, filling most of the square picture. It must clearly be the same {thing} as in the sprite: the same colours, clothing, armour, markings, gear and weapon (show the weapon or tool where it fits in the frame), but drawn with much more detail and slightly more natural, characterful proportions.
+
+Style: hand-painted pixel art, like a detailed 128x128 pixel portrait scaled up with hard square pixels, a limited colour palette, clean dark outlines, no anti-aliasing blur, no smooth gradients, no photo realism.
+
+Lighting and background: a little dramatic - a warm torch light from one side (the torch itself outside the picture) and a deep shadow on the other side, a rim light on the silhouette. Dark atmospheric dungeon background: rough stone wall in darkness, a faint glow and drifting dust or mist, darkening to near black at the edges.
+
+Exactly one {thing}, no text, no letters, no name, no labels, no frame, no border, no signature, no UI.
+```
+
+## Notes per creature
+
+All usable as generated. Weaker in the "close-up" sense: the ram and the catapult show the
+whole machine rather than a close-up; the giant is a plain bald man with a club (as the sprite).
+The cave dwarf in the bestiary uses the dwarf miner's portrait (as it uses its sprite).
+
+## Processing
+
+```bash
+/tmp/sprvenv/bin/python -I scripts/gen.py            # all, or: gen.py <id> ...
+/tmp/sprvenv/bin/python -I scripts/process.py
+```
+
+`process.py`: whole picture (optional per-id crop fractions in `CROP`), box downscale to
+128x128, sharpness 1.6, quantize to 48 colours (max coverage, k-means 4, no dithering), RGB;
+writes `<id>-128.png`, the atlas and `order.txt`.

art/generated/portraits/scripts/gen.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+# Generate bestiary portraits with fal-ai/nano-banana-pro/edit; the reference image is the
+# front and front three-quarter view of the creature's 64 px idle sheet, scaled up 6x.
+import base64, io, json, os, sys, urllib.request, concurrent.futures as cf
+from PIL import Image
+
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+from portraits import CREATURES, prompt_for, sheet
+
+OUT = "/home/zink/Projects/dungeoncraft/art/generated/portraits"
+KEY = open(os.path.expanduser("~/.config/dungeoncraft/fal-key")).read().strip()
+EXTRA = os.environ.get("EXTRA", "")
+
+
+def ref_uri(cid):
+    im = Image.open(sheet(cid)).convert("RGBA")
+    h = im.height
+    two = im.crop((0, 0, 2 * h, h)).resize((12 * h, 6 * h), Image.NEAREST)
+    bg = Image.new("RGBA", two.size, (40, 36, 44, 255))
+    bg.alpha_composite(two)
+    buf = io.BytesIO()
+    bg.convert("RGB").save(buf, "PNG")
+    return "data:image/png;base64," + base64.b64encode(buf.getvalue()).decode()
+
+
+def gen(cid, suffix=""):
+    body = {"prompt": prompt_for(cid, EXTRA), "image_urls": [ref_uri(cid)], "aspect_ratio": "1:1",
+            "resolution": "1K", "num_images": 1, "output_format": "png"}
+    req = urllib.request.Request("https://fal.run/fal-ai/nano-banana-pro/edit", data=json.dumps(body).encode(),
+                                 headers={"Authorization": "Key " + KEY, "Content-Type": "application/json"})
+    try:
+        with urllib.request.urlopen(req, timeout=600) as r:
+            res = json.load(r)
+        with urllib.request.urlopen(res["images"][0]["url"], timeout=300) as r:
+            data = r.read()
+        path = f"{OUT}/{cid}-raw{suffix}.png"
+        open(path, "wb").write(data)
+        return cid, "ok " + path
+    except Exception as e:
+        msg = str(e)
+        if hasattr(e, "read"):
+            try:
+                msg += " " + e.read().decode()[:300]
+            except Exception:
+                pass
+        return cid, "ERROR " + msg
+
+
+if __name__ == "__main__":
+    ids = sys.argv[1:] or [c["id"] for c in CREATURES]
+    suffix = os.environ.get("SUFFIX", "")
+    with cf.ThreadPoolExecutor(4) as ex:
+        for cid, st in ex.map(lambda i: gen(i, suffix), ids):
+            print(cid, st, flush=True)

art/generated/portraits/scripts/portraits.py

@@ -0,0 +1,43 @@
+# Portrait prompts for the bestiary (high-res style). Descriptions come from the sprite pipeline.
+import importlib.util, os
+
+ROOT = "/home/zink/Projects/dungeoncraft"
+_spec = importlib.util.spec_from_file_location("creatures", f"{ROOT}/art/generated/sprites/scripts/creatures.py")
+_cr = importlib.util.module_from_spec(_spec)
+_spec.loader.exec_module(_cr)
+
+IMP = dict(id="imp", kind="Worker", name="Pit Imp",
+           desc="A small goblin-like worker demon: big head, oversized pointed ears and two small black horns, orange skin, glowing yellow eyes, a wide mischievous grin with tiny fangs, a ragged dark-red tunic with a rope belt, carrying a small iron pickaxe with a wooden handle over its right shoulder.")
+CREATURES = [IMP] + [dict(id=c["id"], kind=c["kind"], name=c["name"], desc=c["desc"]) for c in _cr.CREATURES]
+BY_ID = {c["id"]: c for c in CREATURES}
+SIEGE = {"ram", "catapult"}
+BEAST = {"spider", "bat", "owl", "wyrm", "beetle", "cavebear", "gargoyle"}
+
+
+def sheet(cid):
+    if cid == "imp":
+        return f"{ROOT}/assets/sprites/imp-64.png"
+    return f"{ROOT}/art/generated/sprites/{cid}-64.png"
+
+
+TEMPLATE = """The attached image shows a small pixel art game sprite of the "{name}" (left: front view, right: three-quarter view). {desc}
+
+Paint a PORTRAIT of exactly this {thing} for the illustrated monster compendium of a dark-fantasy dungeon strategy game: {framing}, three-quarter view turned slightly to the side, looking at the viewer, filling most of the square picture. It must clearly be the same {thing} as in the sprite: the same colours, clothing, armour, markings, gear and weapon (show the weapon or tool where it fits in the frame), but drawn with much more detail and slightly more natural, characterful proportions.
+
+Style: hand-painted pixel art, like a detailed 128x128 pixel portrait scaled up with hard square pixels, a limited colour palette, clean dark outlines, no anti-aliasing blur, no smooth gradients, no photo realism.
+
+Lighting and background: a little dramatic - a warm torch light from one side (the torch itself outside the picture) and a deep shadow on the other side, a rim light on the silhouette. Dark atmospheric dungeon background: rough stone wall in darkness, a faint glow and drifting dust or mist, darkening to near black at the edges.
+
+Exactly one {thing}, no text, no letters, no name, no labels, no frame, no border, no signature, no UI."""
+
+
+def prompt_for(cid, extra=""):
+    c = BY_ID[cid]
+    if cid in SIEGE:
+        thing, framing = "siege engine", "a close-up of the front part of the machine with its crew-less wooden frame and iron parts"
+    elif cid in BEAST:
+        thing, framing = "creature", "a close-up of its head and the front of its body (bust portrait)"
+    else:
+        thing, framing = "character", "a head-and-shoulders bust portrait"
+    p = TEMPLATE.format(name=c["name"], desc=c["desc"], thing=thing, framing=framing)
+    return p + ("\n\n" + extra if extra else "")

art/generated/portraits/scripts/process.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+# Raw portraits (1024x1024) -> 128x128 pixel-art portraits (box downscale, 48 colours, no
+# dithering, opaque) and the atlas assets/portraits/portraits.png (8 columns) + order.txt.
+import os, sys
+from PIL import Image, ImageEnhance
+
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+from portraits import CREATURES
+
+ROOT = "/home/zink/Projects/dungeoncraft"
+D = f"{ROOT}/art/generated/portraits"
+OUT = f"{ROOT}/assets/portraits"
+SIZE, COLORS, COLS = 128, 48, 8
+CROP = {}  # id -> (l, t, r, b) fractions, default the whole picture
+
+os.makedirs(OUT, exist_ok=True)
+rows = (len(CREATURES) + COLS - 1) // COLS
+atlas = Image.new("RGB", (COLS * SIZE, rows * SIZE), (0, 0, 0))
+order = []
+for i, c in enumerate(CREATURES):
+    im = Image.open(f"{D}/{c['id']}-raw.png").convert("RGB")
+    l, t, r, b = CROP.get(c["id"], (0, 0, 1, 1))
+    w, h = im.size
+    im = im.crop((round(l * w), round(t * h), round(r * w), round(b * h)))
+    im = im.resize((SIZE, SIZE), Image.BOX)
+    im = ImageEnhance.Sharpness(im).enhance(1.6)
+    im = im.quantize(colors=COLORS, method=Image.Quantize.MAXCOVERAGE, kmeans=4, dither=Image.Dither.NONE).convert("RGB")
+    im.save(f"{D}/{c['id']}-{SIZE}.png", optimize=True)
+    atlas.paste(im, ((i % COLS) * SIZE, (i // COLS) * SIZE))
+    order.append(c["kind"])
+atlas.save(f"{OUT}/portraits.png", optimize=True)
+open(f"{OUT}/order.txt", "w").write("\n".join(order) + "\n")
+print(atlas.size, os.path.getsize(f"{OUT}/portraits.png"), "bytes")

art/generated/soul-core-heart/PROMPTS.md

@@ -0,0 +1,38 @@
+# Soul core heart - generated 3D model
+
+Generated on 2026-11-07 with fal.ai. The prompt was written from the game's procedural soul core
+(`draw_throne` and `draw_heart` in `src/render3d.rs`): an obsidian stepped throne, four curved spikes
+with bone tips, iron chains holding a beating crystal heart, and glowing veins.
+
+## Step 1: concept image
+
+- Model: `fal-ai/flux-2-pro`
+- Settings: `image_size: square_hd` (1024x1024), `output_format: png`, `seed: 4711`
+- Result: `concept.png`
+
+Prompt:
+
+```text
+A single dark-fantasy game prop, the "soul core" of an evil dungeon master, isometric three-quarter front view, full object visible and centered, on a plain neutral light-grey studio background, no floor, no scenery, no text.
+
+The prop: a squat stepped pyramid throne of polished black-purple obsidian, four square tiers getting smaller towards the top. At each of the four corners of the base stands a short obsidian pillar, and from each pillar a thick curved obsidian spike rises and leans slightly outwards, its tip capped with yellowed bone. From near the top of every spike a heavy dark iron chain sags inwards and holds a floating heart.
+
+The heart: a faceted crystal heart of deep blood-red ruby, classic heart shape with two rounded lobes and a pointed bottom, hovering about one heart-height above the top tier, held in the air only by the four chains. It glows from inside with hot red-orange light, a few brighter facets catch the light, faint embers drift upwards from it. Thin glowing red veins run across the obsidian steps from below the heart.
+
+Style: stylized low-to-mid poly game asset, chunky readable silhouette, clean shapes, hand-painted textures, like a strategy game building seen from above. Even soft lighting, sharp focus, the whole prop fits in the frame with margin.
+```
+
+## Step 2: image to 3D
+
+- Model: `fal-ai/hunyuan-3d/v3.1/pro/image-to-3d`
+- Input: `concept.png` (front view only, no extra views)
+- Settings: `generate_type: Normal` (textured), `face_count: 100000`, `enable_pbr: false`
+- Result: `soul-core-heart.glb` (about 20 MB, texture baked in; not used by the game yet), preview `preview.png`
+
+No text prompt is used in this step. The model only sees the concept image.
+
+## Notes
+
+- The throne, the chains and the heart are one fused mesh. The heart cannot be animated on its own;
+  for a beating heart, generate it as a separate model (see below).
+- In the concept the heart rests on a small glowing pedestal instead of floating freely.

art/generated/sprites/PROMPTS.md

@@ -0,0 +1,401 @@
+# Creature sprites in the imp's style (fal.ai)
+
+Generated on 2026-11-07: one idle sprite sheet per creature kind of `SPRITE_KINDS` in
+`src/gfx.rs` (all except `EK::Worker`, the imp, see `../imp-sprite/`), in the style of the imp's
+`raw-1.png` lower row. Each creature has `<id>-32.png` (160x32) and `<id>-64.png` (320x64): five
+views side by side (front, front three-quarter turned right, side facing right, back
+three-quarter turned away to the right, back), transparent, one palette per sheet, feet (or the
+lowest pixel) on the bottom row, the tallest or widest view filling the cell. Ids are the
+`unit.<id>` keys; `manifest.json` maps them to the `EK` variants with a quality note.
+
+## Generation
+
+- Model: `fal-ai/nano-banana-pro/edit` (POST https://fal.run/fal-ai/nano-banana-pro/edit)
+- `aspect_ratio: 21:9`, `resolution: 2K`, `num_images: 1`, `output_format: png`
+- Reference image (`image_urls`, as a data URI): `style-ref.png` = the lower row of
+  `../imp-sprite/raw-1.png` (crop fractions 0,0.27,1,0.72) scaled to 1600 px wide, the dark
+  cell frame lines painted over with magenta (the kobold, the first request, still had a
+  reference with frame lines and copied them).
+- Background: flat magenta, flat green (#00FF00) for the purple creatures (spider, mage, bat, trader).
+- 34 images: 30 creatures + 4 retries (spider, dwarf, revenant, ram; each had the wrong
+  number or order of views). For dwarf and ram the retry gave the missing back three-quarter
+  view but lost another one, so both tries are combined. About $5 at ~$0.15 per 2K image.
+- Scripts in `scripts/`: `creatures.py` (descriptions, prompt template), `gen.py` (requests,
+  4 at a time; reads the key from `~/.config/dungeoncraft/fal-key`), `compose.py` (sets chosen
+  figures of one or more raw sheets into one new row), `process.py` (runs the pixelize tool for
+  all creatures with the arguments of `extra.txt`).
+
+Even with "exactly five figures in one row" in the prompt the model often drew two rows (mostly
+two copies of the five views, then the top row is used with `--crop 0,0,1,0.5`) or skipped
+the back three-quarter view.
+
+### Prompt template
+
+`{thing}` is `creature` or `siege engine`; `{pose}` is `standing, idle`, `hovering in the air,
+idle` (bat, gargoyle, owl, wyrm, fairy) or `standing still` (ram, catapult); `{bgname}` is
+`magenta (#FF00FF)` or `green (#00FF00)`. The kobold and the first spider request were sent
+without "exactly five figures in one row (no second row, no extra figures)," (the layout line
+read "the same five views in one single horizontal row,").
+
+```text
+The attached image is the style reference: a pixel art sprite sheet of the "Pit Imp" in five views (left to right: front, front three-quarter turned right, side facing right, back three-quarter turned away to the right, back).
+
+Draw a DIFFERENT {thing} in exactly the same style: the "{name}". {desc}
+
+Use exactly the same style as the reference: the same compact chibi proportions (big head, short stocky body, about the same overall size as the imp), the same thick one-pixel near-black outline, the same palette approach (flat colours with one highlight and one shadow tone), the same pixel size (about 32x32 pixels per figure, scaled up with hard square pixels), no anti-aliasing, no gradients, no blur.
+
+Layout: exactly five figures in one single horizontal row (no second row, no extra figures), the same five views, in the same order (1 front view facing the viewer, 2 front three-quarter view turned to the right, 3 side view facing right, 4 back three-quarter view turned away to the right, 5 back view), evenly spaced, all the same size, {pose}, each figure separated from its neighbours by empty background.
+
+Background: flat pure {bgname} everywhere, no ground, no shadows, no text, no labels, no frames, no grid lines, no cell borders.
+```
+
+Retries (dwarf, revenant) appended:
+
+```text
+Important: there must be exactly FIVE figures in ONE row. Do not skip the fourth one: the back three-quarter view, seen from behind at an angle, the face hidden, the body turned away from the viewer towards the upper right, between the side view and the straight back view.
+```
+
+The ram retry appended instead:
+
+```text
+Important: there must be exactly FIVE drawings of the machine in ONE row, no second row. 1 front view: the iron-capped end of the ram points straight at the viewer. 2 front three-quarter view: the capped end points towards the viewer and to the right. 3 side view: the capped end points to the right. 4 back three-quarter view: the capped end points away from the viewer towards the upper right, we see the rear end of the machine. 5 back view: we see the rear end straight on.
+```
+
+## Pixel grid
+
+`tools/pixelize_sprite.py` (Pillow: `/tmp/sprvenv/bin/python -I`), from the repo root:
+
+```bash
+T=tools/pixelize_sprite.py
+python $T art/generated/sprites/<id>-raw.png art/generated/sprites/<id> --views 5 --size 32 --colors 16 --feet 31 --outline-weight 0.6 [extra]
+python $T art/generated/sprites/<id>-raw.png art/generated/sprites/<id> --views 5 --size 64 --colors 24 --feet 63 --outline-weight 0.6 [extra]
+```
+
+(the tool also writes `<id>-<size>-preview.png`; those were deleted). `[extra]` per creature is
+listed below. Composed raws were made first with `scripts/compose.py` (run from `scripts/`).
+
+### Tool changes (backwards compatible)
+
+- Background key `--bg auto` (default): the key colours are sampled from the sheet's border and
+  only colours close to them (and their blends with the dark outline) are removed, so purple
+  creatures on green survive; `--bg magenta` is the old fixed test, `--bg R,G,B` an explicit key.
+- Blends of the key colour with thin figure parts (pinkish edge pixels on a spear) get no vote.
+- Frame/grid lines (a column or row at least 97% one flat non-background colour) are removed,
+  plus their anti-aliased edges.
+- `--split auto` (default): figures are found by the empty columns between them, else by
+  connected parts, else by cutting touching figures at their thinnest column, else equal cells
+  (`--split cells`, the old behaviour); small pieces of a neighbour at a cell edge are dropped.
+- `--row-counts 4,3` (rows with different numbers of figures) and `--pick 0,1,2,m5,3` (build
+  the output row from chosen figures, `m` mirrors).
+- Single pixels without any neighbour are removed (`--no-despeckle` keeps them).
+- The imp's `raw-1.png` gives the same sheet as before (42 of 5120 pixels differ in coverage).
+
+## Creatures
+
+### kobold - Kobold (`EK::Kobold`)
+
+Description (standing, magenta background): A small scaly lizard-folk warrior: short and wiry, big lizard-like head with a short snout, bright green scaly skin, glowing yellow eyes, a toothy eager grin with sharp little teeth, a simple dark-green tunic, clawed bare feet, a short tail. It holds an upright wooden spear with a steel tip in its right hand.
+
+Raw: kobold-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - chibi lizard, spear in all views; raw has frame lines (removed by the tool)
+
+### spider - Cave Spider (`EK::Spider`)
+
+Description (standing, green background): A big dungeon spider: a big round body and head in dark violet-purple with lighter purple highlights, a cluster of glowing yellow eyes on the front of the head, eight thick black jointed legs spread around it, small fangs. Low to the ground, compact and menacing, cute-chibi proportions with an oversized head.
+
+Raw: spider-raw-try1.png (2 rows of 3, dropped), spider-raw.png (retry, 2 rows of 4, used)
+
+Extra pixelize arguments: `--grid 2x4 --pick 0,1,2,3,3`
+
+Result: ok - usable - both tries came as 2 rows without a back three-quarter view; the back view is used twice (views 4 and 5 identical)
+
+### mage - Shadow Mage (`EK::Mage`)
+
+Description (standing, green background): A hooded dark sorcerer: a big pointed purple hood that hides most of the oversized head, the face in shadow with only a pale chin and two glowing yellow eyes visible, dark-purple robes with light violet trim down to the feet, a wooden staff with a glowing yellow gem on top held in the right hand.
+
+Raw: mage-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - green key, purple hood and robe survive, glowing eyes, gem staff
+
+### ogre - Stone Ogre (`EK::Ogre`)
+
+Description (standing, magenta background): A hulking ogre with skin like rock: broad and hunched, almost no neck, skin of grey stone with darker grey cracks and patches, small glowing yellow eyes, a heavy jaw with an underbite, enormous arms and fists reaching low, short thick legs, a ragged brown loincloth. No weapon - it fights with its fists. Chibi-stocky, as wide as it is tall.
+
+Raw: ogre-raw.png
+
+Extra pixelize arguments: `--crop 0,0,1,0.5`
+
+Result: ok - good - stocky stone ogre; raw has 2 rows (top row used); back three-quarter drawn almost as a side view
+
+### knight - Knight (`EK::Knight`)
+
+Description (standing, magenta background): A heavily armoured knight of the holy Order: a big polished silver great helm with a dark visor slit, silver shoulder plates and greaves, a blue tabard with a yellow sun emblem on the chest over chainmail, dark boots, a short straight steel sword held upright in the right hand.
+
+Raw: knight-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - great helm, blue tabard with sun, sword
+
+### archer - Archer (`EK::Archer`)
+
+Description (standing, magenta background): A hero archer of the Order: a little green hat with a peak, a friendly human face with brown hair, a green tunic with a brown belt, brown trousers and leather boots, a quiver of arrows on the back, holding a wooden bow upright in the left hand.
+
+Raw: archer-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - a bit taller than the imp, bow and quiver readable
+
+### priest - Priest (`EK::Priest`)
+
+Description (standing, magenta background): A healing priest of the Order: a human with short brown hair and a kind face, a long plain white robe down to the feet with a golden sun emblem on the chest, a small golden halo ring floating above the head, hands folded in prayer.
+
+Raw: priest-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - white robe, sun emblem, floating halo
+
+### dwarf - Dwarf Miner (`EK::Dwarf`)
+
+Description (standing, magenta background): A stout dwarf miner of the Order: very short and broad, a grey steel helmet, a big bushy orange beard, a skin-coloured nose and eyes peeking out, a brown leather jerkin and belt, brown trousers and boots, a steel pickaxe with a wooden handle over the right shoulder.
+
+Raw: dwarf-raw-try1.png, dwarf-raw-try2.png (retry) -> composed dwarf-raw.png
+
+Compose: `python compose.py art/generated/sprites/dwarf-raw.png art/generated/sprites/dwarf-raw-try1.png:1:4:0 art/generated/sprites/dwarf-raw-try1.png:1:4:1 art/generated/sprites/dwarf-raw-try1.png:1:4:2 art/generated/sprites/dwarf-raw-try2.png:1:4:3 art/generated/sprites/dwarf-raw-try1.png:1:4:3`
+
+Extra pixelize arguments: none
+
+Result: ok - good - composed from two tries (each had only 4 views): try 1 front/front 3/4/side/back + try 2 back three-quarter
+
+### paladin - Paladin of Light (`EK::Paladin`)
+
+Description (standing, magenta background): A big glowing holy champion: a golden helmet with a dark visor, shining white plate armour with golden trim and a golden sun on the chest, golden greaves, broad shoulders, a white holy sword with a golden hilt held upright in the right hand. Bulkier than the other characters but still chibi.
+
+Raw: paladin-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - white/gold armour, big sword; very bright
+
+### jailer - Jailer (`EK::Jailer`)
+
+Description (standing, magenta background): A big quiet dungeon jailer: broad-shouldered and heavy, a grey leather executioner's hood with eye holes and glowing yellow eyes, grey-skinned bare muscular arms, a dark-red leather apron over the chest and belly, heavy boots, a coiled iron chain hanging from the right hand.
+
+Raw: jailer-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - hood, grey arms, red apron, chain
+
+### priestess - Flame Priestess (`EK::Priestess`)
+
+Description (standing, magenta background): A fire priestess of the dungeon: a woman with fair skin, flame-orange hair rising like fire, a long dark-red robe to the feet with an orange flame emblem on the chest, a small burning fireball floating above her raised right hand.
+
+Raw: priestess-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - flame hair, red robe, fireball
+
+### chainbreaker - Chainbreaker (`EK::Chainbreaker`)
+
+Description (standing, magenta background): A legendary obsidian demon warrior: a muscular demon of black obsidian with glowing orange-lava cracks across the body, glowing yellow eyes, short curved horns, broken iron shackles with dangling chain links on both wrists, a steel battle axe with a light grey blade in each hand, heavy clawed feet.
+
+Raw: chainbreaker-raw.png
+
+Extra pixelize arguments: `--crop 0,0,1,0.5`
+
+Result: ok - good - obsidian with lava cracks, horns, axes; raw has 2 rows (top row used); dark at 32 px
+
+### bat - Giant Bat (`EK::Bat`)
+
+Description (hovering, green background): A big dungeon bat: a round furry dark-purple body with lighter purple highlights, leathery purple wings spread out with black finger bones, big pointed ears, small glowing red eyes, a little fanged mouth, tiny clawed feet hanging down. Hovering in the air, wings spread but kept compact within its own cell.
+
+Raw: bat-raw.png
+
+Extra pixelize arguments: `--crop 0,0,1,0.5`
+
+Result: ok - good - green key, purple body and wings survive; raw has 2 rows (top row used)
+
+### gargoyle - Chain Gargoyle (`EK::Gargoyle`)
+
+Description (hovering, magenta background): A winged stone gargoyle: a crouching, hunched creature of carved grey stone with darker grey cracks, stone bat wings with pale tips, short curved horns, glowing yellow eyes, a grim mouth with fangs, clawed hands and feet, an iron chain wrapped around one arm. Hovering in the air.
+
+Raw: gargoyle-raw.png
+
+Extra pixelize arguments: `--crop 0,0,1,0.5`
+
+Result: ok - good - grey stone, wings, chain; raw has 2 rows (top row used)
+
+### owl - Arcane Owl (`EK::Owl`)
+
+Description (hovering, magenta background): A wise magical owl: a round brown-feathered owl with lighter brown and cream breast feathers, tufted ear feathers, huge glowing yellow eyes with black pupils, a small yellow beak, wings with deep blue magical tips, yellow talons, a judging expression. Hovering in the air with its wings half spread.
+
+Raw: owl-raw.png
+
+Extra pixelize arguments: `--crop 0,0,1,0.5`
+
+Result: ok - good - round chibi owl, blue wing tips; raw has 2 rows (top row used)
+
+### wyrm - Ember Wyrm (`EK::Wyrm`)
+
+Description (hovering, magenta background): A small fire dragon: a compact red dragon with dark-red scales on the back, a glowing orange belly, dark-red bat wings, a single white horn, glowing yellow eyes, a curled tail, clawed legs, small embers of fire at its mouth. Hovering in the air.
+
+Raw: wyrm-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - red dragon, orange belly, white horn; tall and thin because of the hanging tail
+
+### cogling - Cogling (`EK::Cogling`)
+
+Description (standing, magenta background): A sooty little goblin tinkerer: tiny and round, burnt-orange sooty skin, big brass goggles with glowing yellow lenses over the eyes, a grey work overall over an orange shirt, small boots, a steel hammer held up in the right hand, a few small brass cogs on the belt.
+
+Raw: cogling-raw.png
+
+Extra pixelize arguments: `--crop 0,0,1,0.5`
+
+Result: ok - good - goggles, overall, hammer; raw has 2 rows (top row used)
+
+### revenant - Revenant (`EK::Revenant`)
+
+Description (standing, magenta background): An undead warrior: a gaunt pale corpse with a bony white skull face, hollow eye sockets with glowing green grave-light, tattered grey rags and old rusty armour pieces, thin bony arms and legs, a rusty steel sword held in the right hand.
+
+Raw: revenant-raw-try1.png (4 views, dropped), revenant-raw.png (retry, used)
+
+Extra pixelize arguments: none
+
+Result: ok - good - second try (first had only 4 views); big skull, green eyes, rusty sword
+
+### giant - Giant (`EK::Giant`)
+
+Description (standing, magenta background): A hero giant of the Order: a big broad human brute with fair skin, a small bald head with a dumb frown and small eyes, a brown leather jerkin over a blue shirt, bare muscular arms, heavy brown boots, a big wooden tree-trunk club resting on the right shoulder. Bulkier than the other characters but still chibi.
+
+Raw: giant-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - bald brute with club; drawn chibi, so not much bigger than the others (the game scales it)
+
+### fairy - Fairy Spy (`EK::Fairy`)
+
+Description (hovering, magenta background): A tiny glowing fairy informer: a small figure with fair skin, blonde hair and small pointed ears, glowing yellow eyes, a short blue dress, two pairs of translucent pale-blue dragonfly wings, a few golden sparkles below the feet. Hovering in the air.
+
+Raw: fairy-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - blue dress, pale wings; a few gold sparkles below the feet are part of the sprite, so the bottom row is the sparkles, not the feet
+
+### battlemage - Battle Mage (`EK::BattleMage`)
+
+Description (standing, magenta background): A fire mage of the Order: a tall pointed blue wizard hat, a human face with a stern look and a short grey beard, long blue robes with white trim and a white sash, a wooden staff in the right hand with a burning orange-yellow flame on top.
+
+Raw: battlemage-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - blue hat and robes, burning staff, grey beard
+
+### ram - Battering Ram (`EK::Ram`)
+
+Description (siege engine, magenta background): A wooden siege battering ram, no people visible: a compact wooden frame on four solid wooden wheels with a slanted brown plank roof; under the roof hangs a thick tree trunk with a big grey iron cap on its front end. Brown and dark-brown wood, iron rivets. Chunky toy-like proportions. Show the same five views of the machine (front, front three-quarter turned right, side facing right, back three-quarter, back).
+
+Raw: ram-raw-try1.png, ram-raw-try2.png (retry) -> composed ram-raw.png
+
+Compose: `python compose.py art/generated/sprites/ram-raw.png art/generated/sprites/ram-raw-try1.png:2:3,3:0 art/generated/sprites/ram-raw-try1.png:2:3,3:2 art/generated/sprites/ram-raw-try1.png:2:3,3:1 art/generated/sprites/ram-raw-try2.png:2:3,2:4 art/generated/sprites/ram-raw-try1.png:2:3,3:5`
+
+Extra pixelize arguments: none
+
+Result: ok - usable - composed from two tries (both 2 rows, views out of order): try 1 front/front 3/4/side/back + try 2 back three-quarter; the side view is wide, the 'back' view of try 1 may show the front end again
+
+### catapult - Catapult (`EK::Catapult`)
+
+Description (siege engine, magenta background): A wooden siege catapult, no people visible: a low rectangular wooden base on four wooden wheels, a wooden throwing arm angled upward with a cup at its tip holding a grey stone boulder, ropes and a crossbeam. Brown and dark-brown wood, iron fittings. Chunky toy-like proportions. Show the same five views of the machine (front, front three-quarter turned right, side facing right, back three-quarter, back).
+
+Raw: catapult-raw-orig.png -> composed catapult-raw.png
+
+Compose: `python compose.py art/generated/sprites/catapult-raw.png C:2:4,3:0 C:2:4,3:1 C:2:4,3:2 C:2:4,3:3 C:2:4,3:6::0.8   # C = art/generated/sprites/catapult-raw-orig.png`
+
+Extra pixelize arguments: none
+
+Result: ok - usable - raw came as 2 rows of 4+3; front/front 3/4/side/back 3/4 from the top row, back view from row 2 (scaled 0.8); noisy at 32 px
+
+### cavebear - Cave Bear (`EK::CaveBear`)
+
+Description (standing, magenta background): A shaggy cave bear: big, round and shaggy, thick dark-brown fur with lighter brown highlights, small round ears, small glowing yellow eyes, a light tan muzzle with a black nose, big paws with claws, standing on all four legs, grumpy. Chunky chibi proportions with a big head.
+
+Raw: cavebear-raw.png
+
+Extra pixelize arguments: `--grid 2x4 --row-counts 4,2 --pick 0,1,2,m5,3`
+
+Result: ok - good - four-legged bear; raw has 2 rows of 4+2; back three-quarter is a mirrored figure of row 2
+
+### beetle - Giant Beetle (`EK::Beetle`)
+
+Description (standing, magenta background): A beetle the size of a barrel: a big round shiny dark-green shell with lighter green highlights and a line down the middle, a dark head with glowing yellow eyes, two curved black mandibles and two short antennae, six short black legs. Low on the ground, chunky and round.
+
+Raw: beetle-raw-orig.png -> composed beetle-raw.png
+
+Compose: `python compose.py art/generated/sprites/beetle-raw.png B:2:4,2:0 B:2:4,2:1 B:2:4,2:2 B:2:4,2:5::0.78 B:2:4,2:3   # B = art/generated/sprites/beetle-raw-orig.png`
+
+Extra pixelize arguments: none
+
+Result: ok - good - green shell, yellow eyes; raw has 2 rows of 4+2; back three-quarter from row 2 (scaled 0.78)
+
+### trader - Trader (`EK::Trader`)
+
+Description (standing, green background): A wandering hooded merchant: a deep purple hooded cloak with a friendly human face peeking out, a yellow clasp on the chest, a big brown leather backpack piled high with goods, brown boots, a small glowing lantern held in the right hand.
+
+Raw: trader-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - green key, purple cloak survives, backpack, lantern
+
+### thief - Thief (`EK::Thief`)
+
+Description (standing, magenta background): A sneaky thief: a dark charcoal-grey hood and a black mask over the lower face with only the eyes showing, close-fitting dark-grey clothes with a brown belt and soft brown boots, a short steel dagger in the right hand, a bulging tan sack of gold coins slung over the back.
+
+Raw: thief-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - dark hood and mask, dagger, tan loot sack
+
+### monk - Monk (`EK::Monk`)
+
+Description (standing, magenta background): A fighting monk of the Order: a shaven bald head, calm face with closed eyes, a simple orange robe with darker orange shading, tied with a yellow rope belt, bare arms and bare fists raised in a ready fighting stance, sandals.
+
+Raw: monk-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - bald, orange robe, fists raised
+
+### ranger - Ranger (`EK::Ranger`)
+
+Description (standing, magenta background): A woodsman ranger of the Order: a green hood and green cloak, a human face, a green tunic with a brown leather belt and strap, brown leather trousers and boots, a wooden bow held upright in the left hand, a small iron snare trap hanging from the belt.
+
+Raw: ranger-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - green hood and cloak, bow, snare
+
+### inquisitor - Inquisitor (`EK::Inquisitor`)
+
+Description (standing, magenta background): A frail zealous preacher of the Order: a thin old man with a tall dark-red mitre hat, a pale face with narrowed eyes, long white robes with a red stripe down the middle and red hems, holding open a glowing yellow holy book in front of him.
+
+Raw: inquisitor-raw.png
+
+Extra pixelize arguments: none
+
+Result: ok - good - red mitre, white/red robes, glowing book; looks less frail than described

art/generated/sprites/anim/PROMPTS.md

@@ -0,0 +1,151 @@
+# Creature animations (pilot: knight, kobold)
+
+Generated on 2026-11-07 with `fal-ai/nano-banana-pro/edit` (`resolution: 2K`, `num_images: 1`,
+`output_format: png`), following the imp's digging animation (`../../imp-sprite/PROMPTS.md`).
+
+Every sheet has the layout of `imp-hack-*.png`: 4 frames across, 5 views down (front, front
+three-quarter turned right, side facing right, back three-quarter turned away to the right,
+back), transparent, the feet on the bottom row of every cell, the SAME body scale, feet row and
+palette as the creature's idle sheet (`../<id>-32.png` / `-64.png`), so frames and idle line up.
+
+| file | size |
+| --- | --- |
+| `<id>-walk-32.png`, `<id>-attack-32.png` | 128x160 |
+| `<id>-walk-64.png`, `<id>-attack-64.png` | 256x320 |
+| `<id>-<anim>-<size>-preview.png` | frames scaled up (8x / 4x), the idle view in the right column, dotted feet row |
+
+`walk`: contact, passing, contact (other leg), passing; the creature walks in place (the game
+moves it). `attack`: wind-up, strike, impact, recover; the feet stay in place.
+
+## Script
+
+`../scripts/make_anim.py` (Pillow venv: `/tmp/sprvenv/bin/python -I`; reads the key from
+`~/.config/dungeoncraft/fal-key`, never prints it):
+
+```bash
+S=art/generated/sprites/scripts/make_anim.py
+python $S gen <id> <walk|attack> [front|back|both] [--suffix -2] [--strict] [--front-src F] [--print]
+python $S pix <id> <walk|attack> [--front F] [--back B] [--view V=SPEC ...] [--add-colors "R,G,B;..."]
+```
+
+### gen
+
+1. **front request** (`<id>-<anim>-front-raw<S>.png`, `aspect_ratio 4:5`): reference = the idle
+   raw (`../<id>-raw.png`, the `--crop` of `../scripts/extra.txt` if any) at half size with the
+   background (and any frame lines, e.g. the kobold's raw) repainted in flat key colour. Asks for
+   the full 5x4 grid; rows 1-3 are used, rows 4-5 sometimes too (see below).
+2. **back request** (`<id>-<anim>-back-raw<S>.png`, `aspect_ratio 16:9`): references = the same
+   idle reference + rows 1-3 of the front raw (`--front-src` picks another front raw). 2x4 grid.
+   `--strict` adds a sentence that all eight figures, the strike frames included, are seen from
+   behind (no visor/face/emblem) and that the back three-quarter row is turned clearly right.
+
+Prompts: built by `prompt_front` / `prompt_back` from the creature's idle description
+(`creatures.py`), the per-creature `WEAPON` and `ATTACK` texts and the generic `WALK_*` frame
+texts in `make_anim.py`. A batch for all creatures needs a `WEAPON` and an `ATTACK` entry for each
+one (the walk text is generic). `--print` shows the prompts. Example (kobold attack, front):
+
+```text
+The attached image is a pixel art sprite sheet of the "Kobold" in five views (left to right: front, front three-quarter turned right, side facing right, back three-quarter turned away to the right, back). A small scaly lizard-folk warrior: ... It holds an upright wooden spear with a steel tip in its right hand.
+
+Create a new pixel art sprite sheet of exactly the same character - same proportions, colours, outline, pixel size, clothes and equipment - showing a spear thrust: the kobold holds the spear level with both hands and stabs it forward at an enemy in front of it.
+
+Layout: a grid of 5 rows and 4 columns, every figure the same size, evenly spaced, each in its own equal cell, all standing on the same baseline within their row.
+Rows (one view per row, top to bottom): 1 front view facing the viewer, 2 front three-quarter view turned to the right, 3 side view facing right, 4 back three-quarter view turned away to the right, 5 back view.
+Columns (animation frames, left to right): 1 wind-up - the spear pulled back, held level at waist height with both hands, the tip pointing forward, body leaning back; 2 strike - the spear pushed forward, body leaning forward; 3 impact - the spear fully thrust forward, arms stretched out, body lunging forward, a small white spark at the spear tip; 4 recover - the spear pulled back to the ready position, body upright.
+The feet stay in place in all four frames; only arms, weapon, head and upper body move.
+Every frame of a row keeps exactly that row's view direction (the side view row stays in profile facing right in all four frames, the back rows never show the face), and the character holds the same wooden spear with the steel tip in the right hand in every single frame.
+
+Style: identical to the attached sheet - crisp retro pixel art, hard square pixels, one-pixel near-black outline, limited palette, no anti-aliasing, no blur. Flat pure magenta (#FF00FF) background everywhere, no ground, no shadows, no text, no labels, no frame lines, no grid lines, no motion lines.
+```
+
+The first four front requests (`*-front-raw.png`) were sent without the "Every frame of a row
+keeps ..." sentence and without "no motion lines"; the knight attack strike frame also asked
+for "a short white motion arc behind the blade" (the model drew big white swoosh rings; removed).
+The back prompt is the imp's back prompt with the character's name and frame texts.
+
+### pix
+
+Per view row: the row is cut out of the raw (bands found by the empty rows between them,
+falling back to cuts at the emptiest rows near even splits when weapons touch the next row),
+pixelized with `tools/pixelize_sprite.py --grid 1xN --size S --feet S-1 --outline-weight 0.6
+--palette ../<id>-S.png`, and:
+
+- **scale**: the step is iterated until the median *core height* of the row's figures equals
+  the core height of the idle view. Core = from the first pixel row whose longest opaque run is
+  at least 20% of the cell wide (a spear tip or a raised blade is narrower, the head is wider)
+  to the last row with a run of at least 3 px. So a spear above the head or a sword raised in
+  the wind-up does not shrink the body.
+- **position**: each frame is shifted so that its core bottom is on the feet row and the median
+  centre of its core rows is at the idle view's centre (the tool itself centres by bounding box,
+  which would push the body away from an outstretched weapon). Pixels pushed out of the cell are
+  cut (logged as `CLIPPED n px`).
+- **check**: the log prints per view the ratio of the frames' median body width to the idle
+  view's (`width ratio`, flagged beyond +-10%): the model sometimes redraws the character
+  stockier or slimmer, which no scaling can hide.
+- `--view V=SPEC` takes the frames of view V from other rows or files:
+  `FILE:BAND/NBANDS:COUNT:PICKS[;FILE:...]` (empty FILE = the front raw; PICKS like `0,2,1,3`,
+  `m1` mirrors). Every source row is scaled on its own, so frames of different raws can be mixed.
+
+## Requests (11 images, about $1.65 at ~$0.15 per 2K image)
+
+| raw | result |
+| --- | --- |
+| `knight-walk-front-raw.png` | rows 1-2 ok; row 3 had SIX figures (4 side + 2 back three-quarter), rows 4-5 mixed. Side row used (figures 0,2,1,3: stride, pass, stride, pass) |
+| `knight-walk-front-raw-2.png` (retry) | all 5 rows correct; front, front 3/4, back 3/4, back used; its side row shows the same stride four times |
+| `knight-attack-front-raw.png` | front and front 3/4 rows nearly identical, side row turned to the front in frames 2-3, big white swoosh rings: dropped |
+| `knight-attack-front-raw-2.png` (retry, new sentence) | rows 1-3 good (raised, over the helm, low at the left, ready) |
+| `knight-attack-back-raw.png` | strike frame (column 2) showed the visor and the chest emblem in both rows: dropped |
+| `knight-attack-back-raw-2.png` (retry, `--strict`) | good: all from behind, row 1 slightly turned |
+| `kobold-walk-front-raw.png` | spear missing in the passing frames of the front and side rows: dropped |
+| `kobold-walk-front-raw-2.png` (retry) | SIX frames per row, spear in nearly all; figures 0,1,3,4 used; back 3/4 row inconsistent |
+| `kobold-walk-back-raw.png` (`--strict`, reference = the first 4 columns of raw-2, `kobold-walk-front-raw-2-4cols.png`) | good back views but the spear vanishes in the passing frames; frames 0 and 2 used |
+| `kobold-attack-front-raw.png` | very good, rows 1-5 all right |
+| `kobold-attack-back-raw.png` | row 1 good; row 2 frames 2-3 are back three-quarter views instead of the back view |
+
+## Commands used
+
+```bash
+cd art/generated/sprites/anim; P="/tmp/sprvenv/bin/python -I"; S=../scripts/make_anim.py
+$P $S pix knight walk --front knight-walk-front-raw-2.png --view "2=knight-walk-front-raw.png:2/4:6:0,2,1,3" \
+    --view "3=knight-walk-front-raw-2.png:3/5:4:0,1,2,3" --view "4=knight-walk-front-raw-2.png:4/5:4:0,1,2,3"
+$P $S pix knight attack --front knight-attack-front-raw-2.png --back knight-attack-back-raw-2.png
+$P $S pix kobold walk --front kobold-walk-front-raw-2.png \
+    --view "0=:0/5:6:0,1,3,4" --view "1=:1/5:6:0,1,3,4" --view "2=:2/5:6:0,1,3,4" \
+    --view "3=kobold-walk-back-raw.png:0/2:4:0;:3/5:6:4;kobold-walk-back-raw.png:0/2:4:2;:3/5:6:4" \
+    --view "4=:4/5:6:0,1,3,4"
+$P $S pix kobold attack --view "4=kobold-attack-back-raw.png:1/2:4:0;kobold-attack-front-raw.png:4/5:4:1,2;kobold-attack-back-raw.png:1/2:4:3"
+```
+
+No extra colours were needed: the steel of both weapons is in the idle palettes.
+
+## Quality
+
+- **knight-walk**: usable. Height and feet line up with idle (core height = the full cell, as
+  in idle), no vertical shift. The model drew the knight about 5-15% wider/stockier than the idle
+  sheet (width ratio 1.01-1.18 in the log), so switching idle -> walk shows a slightly broader
+  knight. Leg motion is small in the front views; the side view comes from the first raw (a
+  separate image, 6 figures in that row) and is a real stride/pass cycle but differs a little in
+  shading from the other rows.
+- **knight-attack**: good motion, readable in every view (sword raised over the shoulder,
+  over the helm, low at the left, ready). Same stockiness as the walk (width ratio up to 1.3 in
+  the front three-quarter row, partly the sword). The knight fills the whole cell height, so
+  a sword raised above the helm is cut at the top of the cell (the tool crops it; not counted in
+  the CLIPPED log). The low impact blade loses up to 5 px at the cell side (64).
+
+- **kobold-walk**: usable. Body, head and feet line up with idle in every view (core heights
+  equal, no vertical shift). The leg motion is subtle (the model draws small steps), the spear
+  stays in the hand in all frames. Back three-quarter: frames 2 and 4 are the same figure
+  (from the front raw-2), frames 1 and 3 come from the back request and are drawn a little
+  narrower, so that view jitters slightly.
+- **kobold-attack**: good. Clear thrust in all views; body and feet line up with idle. The
+  level spear is longer than the cell, so its butt or tip is cut at the cell edge in most
+  frames (up to 8 px at 32, 33 px at 64 in the front impact frame). The front three-quarter
+  wind-up holds the spear pointing backwards. Back view: frames 1 and 4 from the back request,
+  frames 2-3 from row 5 of the front raw (the back request had back three-quarter figures there).
+  The white impact spark is mapped to the nearest palette colour (light grey) or lost.
+
+## Raw files
+
+The raws `*-raw*.png` are large and not covered by `.gitignore` (which only ignores
+`art/generated/sprites/*-raw*.png`); add `art/generated/sprites/anim/*-raw*.png` before
+committing.