Fix sector drag and drop

SOURCES.md

@@ -1,7 +1,7 @@
 # Sources
 
-Every binary artifact in this repo was exported from a source file in Nextcloud. This maps
-one to the other.
+Every binary artifact in this repo was exported from a source file in Nextcloud. This maps one
+to the other.
 
 **Nextcloud share:** `DartGame/sources/`
 
@@ -12,46 +12,80 @@ one to the other.
 
 ## Models
 
-| Repo artifact | Nextcloud source | Last export |
-|---|---|---|
-| `game/core/board/dartboard.glb` | `sources/dartboard/dartboard.blend` | 2026-07-11 |
-| `game/core/dart/dart.glb` | `sources/dart/dart.blend` | 2026-07-11 |
-
-## Skins — bullseye
-
-| Repo artifact | Nextcloud source | Last export |
-|---|---|---|
-| `game/content/official/skins/bullseye/neon_bulls.png` | `sources/dartboard/textures/neon_bulls.kra` | 2026-07-11 |
-
-## Skins — sectors
-
-| Repo artifact | Nextcloud source | Last export |
-|---|---|---|
-| `game/content/official/skins/sectors/neon_hiero_sector.png` | `sources/dartboard/textures/neon_hiero_sector.kra` | 2026-07-11 |
-
-## Skins — flat tire
-
-| Repo artifact | Nextcloud source | Last export |
-|---|---|---|
-| `game/content/official/skins/flat_tire/fire.png` | `sources/dartboard/textures/flat_tire.kra` | 2026-07-11 |
-
-## Skins — flights
-
-| Repo artifact | Nextcloud source | Last export |
-|---|---|---|
-| `game/content/official/skins/flights/default.png` | `sources/dart/textures/wings_default.kra` | 2026-07-11 |
+| Repo artifact | Nextcloud source |
+|---|---|
+| `game/core/board/dartboard.glb` | `sources/dartboard/dartboard.blend` |
+| `game/core/dart/dart.glb` | `sources/dart/dart.blend` |
 
 ---
 
 ## Fallback textures
 
-Single default textures that ship with the mesh so the editor isn't pink. Not skins — these
-live in `core/`, not `content/`.
+These live in `core/`, **not** `content/`. They're the defaults that ship with the mesh so the
+board renders correctly with zero mods loaded. They are not skins.
+
+The board has 21 material slots (`sector_1`…`sector_20`, `bulls`); the 20 sector materials share
+the two `sector_*` images by default.
 
 | Repo artifact | Nextcloud source |
 |---|---|
-| `game/core/board/dartboard_default.png` | `sources/dartboard/textures/cork.kra` |
-| `game/core/dart/dart_default.png` | `sources/dart/textures/dart_default.kra` |
+| `game/core/board/dartboard_bulls.png` | `sources/dartboard/textures/default/bulls.kra` |
+| `game/core/board/dartboard_sector_black.png` | `sources/dartboard/textures/default/sector_black.kra` |
+| `game/core/board/dartboard_sector_white.png` | `sources/dartboard/textures/default/sector_white.kra` |
+| `game/core/board/dartboard_flat_tire.png` | `sources/dartboard/textures/default/flat_tire.kra` |
+| `game/core/board/dartboard_spider.png` | `sources/dartboard/textures/default/spider.kra` |
+| `game/core/dart/dart_body.png` | `sources/dart/textures/default/body.kra` |
+| `game/core/dart/dart_wings.png` | `sources/dart/textures/default/wings.kra` |
+
+> The `dartboard_*` / `dart_*` prefixes are Godot's — it extracts the textures embedded in the
+> `.glb` on import and names them after the model. Don't rename them; the materials reference
+> them by that name.
+
+---
+
+## Skins — bulls
+
+| Repo artifact | Nextcloud source |
+|---|---|
+| `game/content/official/skins/bulls/neon_hiero.png` | `sources/dartboard/textures/bulls_skins/neon_hiero.kra` |
+
+## Skins — sectors
+
+| Repo artifact | Nextcloud source |
+|---|---|
+| `game/content/official/skins/sectors/neon_hiero_black.png` | `sources/dartboard/textures/sector_skins/neon_hiero_black.kra` |
+| `game/content/official/skins/sectors/neon_hiero_white.png` | `sources/dartboard/textures/sector_skins/neon_hiero_white.kra` |
+
+## Skins — flat tire
+
+| Repo artifact | Nextcloud source |
+|---|---|
+| `game/content/official/skins/flat_tire/ocean_fire.png` | `sources/dartboard/textures/flat_tire_skins/ocean_fire.kra` |
+| `game/content/official/skins/flat_tire/toon_purple.png` | `sources/dartboard/textures/flat_tire_skins/toon_purple.kra` |
+
+---
+
+## Generated, not exported
+
+These are produced **by Godot**, not by Blender or Krita. They have no Nextcloud source.
+
+| Artifact | What it is |
+|---|---|
+| `game/core/board/dartboard_collision.res` | Trimesh (`ConcavePolygonShape3D`), 1358 faces. Generated from the `dartboard` mesh via Mesh → Create Collision Shape → Trimesh, then extracted from the `.tscn` with Shape → Save As. **~9 MB.** |
+| `game/core/board/spider_collision.res` | Same, for the spider wire. |
+
+> Regenerate these if the board geometry changes. They are **not** rebuilt automatically on
+> re-export.
+
+---
+
+## Not yet exported
+
+Sources that exist in Nextcloud but have no artifact in the repo yet.
+
+| Nextcloud source | Destined for |
+|---|---|
+| `sources/dart/textures/wings/red_blue.kra` | `content/official/skins/flights/red_blue.png` |
 
 ---
 
@@ -59,7 +93,10 @@ live in `core/`, not `content/`.
 
 1. Export from the Nextcloud source
 2. Drop the artifact into the repo path above
-3. **Update the "Last export" date in this file**
-4. Commit the artifact + this file together
+3. Commit the artifact **and its `.import` file** together
+4. Update this file if anything new appeared
+
+**Names must match.** `neon_hiero_black.kra` → `neon_hiero_black.png`. We drifted once already
+(`purple_toon.kra` vs `toon_purple.png`) — that's exactly what this file exists to catch.
 
 If a row is missing, the artifact has no traceable source. Add it, or find out why it exists.