Unity Rule Tile from a 47 or 16 Tileset — No Rules by Hand
Instead of chopping the sheet and clicking 47 neighbour rules, drop it here: the layout is recognised, and the Unity bundle's editor script slices the sprites (Point, uncompressed) and builds the Rule Tile from the bits.
- Unity 6 Rule TileVerified· Unity 6000.5.3f1 + 2D Tilemap Extras 8.0.3
- Godot 4 TileSetVerified· Godot 4.7.2
- TiledVerified· Tiled 1.12.2
- LDtkPartly verified· LDtk 1.5.3 schema + loader
What it does
- Blob-47 and side-16 sets; the rules come from the recognised or painted terrain bits.
- Editor/NerulioRuleTileImporter.cs builds one RuleTile per terrain with 2D Tilemap Extras.
- Checked in Unity 6000.5.3f1 + Tilemap Extras 8.0.3: a painted Tilemap shows the predicted sprite in every cell, sprite rects and pixels exact.
- Where a combination is missing, Unity draws the Rule Tile's default sprite — the Studio's test map shows that too.
How to do it
- Drop the tileset and apply its layout.
- Read the Check panel; fill any missing combinations.
- Export for Unity 6.
- Copy the bundle into Assets/; the Rule Tiles appear after import.
Engine exports and how each was checked
"Verified" means the exported files were loaded by the real engine or tool on real CC0 assets and the result was compared with the source. Anything that was not loaded is labelled as such.
| Target | Files | Check |
|---|---|---|
| Godot 4 TileSet | PNG · nerulio-tileset.json · nerulio_tileset_import.gd | Verified Godot 4.7.2The included import script builds the TileSet with terrain peering bits; a map painted with set_cells_terrain_connect equals the Studio preview in every cell on 9 corpus sheets. |
| Tiled | .tsx Wang set · sample.tmx | Verified Tiled 1.12.2Tiled's own readers load every Wang ID as written and the sample map renders pixel-exact. The terrain brush itself was not driven. |
| Unity 6 Rule Tile | nerulio-ruletile.json · Editor/NerulioRuleTileImporter.cs | Verified Unity 6000.5.3f1 + 2D Tilemap Extras 8.0.3Blob and side sets: a painted Tilemap shows the predicted sprite in every cell. Corner / dual-grid sets are not exported to Unity. |
| LDtk | .ldtk (1.5.3) · rules · sample level | Partly verified LDtk 1.5.3 schema + loaderAccepted by the LDtk JSON schema and its official loader, and the rules re-run to the exported tiles; not opened in the LDtk app. |
Evidence
Layouts identified from the pixels alone on the tile corpus: 4 blob-47 templates and 2 Wang templates with high confidence, a real 64 px cave tileset with medium confidence — every tile's bits right. Godot 4.7.2 painted every test cell exactly as the Studio predicted (485/485 per blob set, 251/251 on a 4-terrain dual-grid pack); Tiled 1.12.2 read every Wang ID back; Unity 6000.5 matched on every painted cell of the blob and side sets.
Limits
- Tiled's terrain brush, the LDtk app and Godot's editor painter were not driven; the checks use the engines' readers and set_cells_terrain_connect.
- Unity gets blob and side sets only; several terrains become several Rule Tiles with no transitions between them.
- Isometric and hex tiles, animated tiles, occlusion and navigation layers are out of scope.
- Suggesting bits without a known layout needs a reference "full" tile; on side-only path templates the guess can fail until you select it.
Questions
Does it need Unity's 2D Tilemap Extras?
Yes, Rule Tiles come from that package (checked with 8.0.3).
Several terrains in one sheet?
Each terrain becomes its own Rule Tile; Unity draws no transitions between them.
Is it free, and do I need an account?
Everything on these pages is free and works without an account. There is no watermark and no export that is held back.
Are my sprites uploaded?
No. The Studio decodes, packs and exports in this browser tab. Projects are autosaved in the browser (IndexedDB) and can be saved as a .nerulio file.
Does it need Aseprite or an engine plugin installed?
No. .aseprite files are read and written in the browser, and each engine bundle carries what that engine needs (for Godot, the import settings and scene; for Unity and the Godot TileSet, a small editor script).