Low-poly terrain sculpting in the browser — no build step, no install.
Draw, scale and scatter a whole low-poly world in real time. A heightfield editor built on Three.js: brush the terrain like sculpting clay, place CC0 models with per-object density and size control, switch complete map styles, and grab individual vertices or faces and move them by hand.
git clone https://github.com/OpenRootdev/terrain-editor.git
cd terrain-editor
python3 -m http.server 8901Open http://localhost:8901/ — that's it. Any static file server works;
Start Terrain Editor.bat does the same on Windows (Python required, no
npm/node anywhere).
Slow machine or software rendering? Add ?lite to the URL.
| Where | What it does |
|---|---|
| Left tools | Sculpt · Pull · Flatten · Scale · Mountain · Lake · Smooth · Region · Edit · Place |
| Brush settings | Size, Height, Strength, Falloff, round/box shape, raise/lower/toggle |
| Edit tool | Click = select a vertex, Shift+click = add, drag up/down = move (toggle Vertex / Face to grab whole quads; Esc clears, Ctrl+Z undoes) |
| Right panel | Water level & styles, map styles, textures/tile size, procedural regenerate |
| Bottom bar | Asset tabs; every variant gets a density-weight, size, count and randomize row |
Map styles set palette, scatter rules, water, sky and shading in one switch: Stylized · PS2 / Crash (sunset) · Autumn · Desert · Winter · Volcanic. Styles and the flat-color/textured modes share one rule set, so they always agree.
- 10 terrain brushes + an editor-style vertex/face mover with undo.
- Procedural regenerate (seed, size, roughness) — mountains, lakes, islands.
- Weighted seeded scatter: per-asset density, size, counts, reshuffle; a 4th pool lets huts/ruins litter the map like trees do.
- Depth-graded water with three color styles, shore foam and scrolling ripples.
- Height-respecting layered materials (sand → dirt → grass → rock → snow) with a stochastic blocky snow line; textured mode blends four CC0 textures.
- 213 bundled CC0 models (Kenney Nature Kit, 3TD tropical/ruins packs, Modular Temple, Poly Haven HQ) — flat, local, instant.
- Diagnostics exposed on
window.__editorfor scripted testing.
Drop a GLB into web/assets/lp/ and list it in
web/assets/lp/manifest.json (category: trees / rocks / vegetation /
props) — tile, weight row and scatter participation follow automatically.
tools/convert_dae.py and tools/convert_packs.py convert OBJ/DAE packs
the same way. What's still missing, with generation prompts, lives in
GAP-ASSETS.md.
Public v1 — brush/scatter/styles/edit all working and browser-verified. Honest known issues: texture tiles repeat at far zoom, no save/load of scenes yet (undo within a session only), style switches apply scatter weights on the next Scatter press. Full reference: docs/REFERENCE.md.
- three.js (MIT), vendored r170
- Kenney Nature Kit — CC0
- 3TD Tropical Environment & Fantasy Ruins packs (Ron Kapaun) via OpenGameArt — CC0
- Modular Temple (Fertile Soil) via OpenGameArt — CC0
- Poly Haven HQ models/textures — CC0
Code under Apache License 2.0; bundled assets are CC0.