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Heightmap Level Generator

github.com

Free plan Open source WebWindowsSelf-hosted
Visit github.com
Spec score 8.6 #2 of 27 in Game Map Generators

What it is

Heightmap Level Generator creates procedural terrain and heightmaps in a browser for Unreal Engine, Unity and Godot. Its GPU-based generation uses WebGPU compute shaders and WGSL. Outputs include 16-bit heightmaps with features such as cliffs, hills, mountains, erosion, rivers, lakes and a raised border ring. It can also generate connected roads, towns, map exits, road grades and embankments around water, with temperate, steppe, desert and snow world biomes. Users can adjust settings live, compare 12 seeds, preview a 2D map and 3D mesh, and walk through terrain in first person. Exports include engine-specific terrain formats, Web or three.js formats, heightmaps, splatmaps, masks, water levels, color maps, layout JSON, glTF meshes and metadata JSON. Road, town and water masks and layout data can support PCG, Houdini and custom placement scripts. The free project supports share links, presets, JSON save and load, and undo and redo. Online use requires a WebGPU-capable browser; local use requires Node.js and such a browser.

Spec sheet

What it does
It generates procedural terrain and heightmaps for Unreal Engine, Unity and Godot in a browser.Read 15 Oct 2026 · github.com
Purpose
Heightmap Level Generator creates procedural terrain and heightmaps for Unreal Engine, Unity and Godot in a browser.Read 1 Oct 2026 · github.com
API and SDK
The published material documents no network API or SDK; extensibility is through source code and exported files.Read 15 Oct 2026 · github.com
Automation integration
Road, town and water masks plus layout JSON are intended for PCG, Houdini and custom placement scripts.Read 15 Oct 2026 · github.com
Auxiliary exports
Exports include splatmaps, slope, normal, curvature and flow masks, road/town/water masks, water-level and color-map PNGs, layout JSON and metadata JSON.Read 15 Oct 2026 · github.com
Biomes
The generator provides temperate, steppe, desert and snow biomes.Read 15 Oct 2026 · github.com
Browser requirements
The hosted tool requires WebGPU and lists desktop Chrome or Edge 113+, Safari 26+ and Firefox 141+ on Windows.Read 15 Oct 2026 · m-w-marker.github.io
Documentation depth
The README documents parameters, export dimensions, coordinate conventions, mask encodings, layout fields and the generation pipeline.Read 15 Oct 2026 · github.com
Editing workflow
It supports live parameter changes, undo/redo, presets, JSON save/load and shareable URLs containing settings.Read 15 Oct 2026 · github.com
Engine exports
Exports include Unreal landscape, Unity terrain, Godot Terrain3D and Web or three.js formats.Read 1 Oct 2026 · github.com
Export files
Exports can include 16-bit PNG or RAW heightmaps, splatmaps, masks, water levels, color maps, layout JSON, glTF meshes and metadata JSON.Read 1 Oct 2026 · github.com
Export ownership
The README says exported heightmaps, masks, layouts and meshes belong to the user without conditions.Read 15 Oct 2026 · github.com
Godot and web export
Godot Terrain3D receives a 16-bit heightmap and web or three.js workflows receive a glTF mesh.Read 15 Oct 2026 · github.com
GPU generation
Terrain is generated with WebGPU compute shaders written in WGSL while controls are adjusted.Read 15 Oct 2026 · github.com
Independent description
The GitHub topic listing describes it as a free procedural terrain and heightmap generator for Unreal, Unity and Godot running in a WebGPU browser.Read 15 Oct 2026 · github.com
Independent directory listing
GitHub's erosion topic page lists Heightmap Level Generator among seven JavaScript repositories matching that topic.Read 15 Oct 2026 · github.com
Independent metadata
That GitHub topic page labels the repository JavaScript and shows it updated on September 13, 2026.Read 15 Oct 2026 · github.com
Independent topic tags
GitHub's topic listing associates the repository with WebGPU, procedural generation, terrain generation, Unity, Godot, Unreal Engine, erosion and WGSL tags.Read 15 Oct 2026 · github.com
Interactive editing
Users can adjust settings live, compare 12 seeds, preview a 2D map and 3D mesh, and walk through the terrain in first person.Read 1 Oct 2026 · github.com
Licence
The source is released under the MIT License, including permission to use it commercially.Read 15 Oct 2026 · github.com
License and ownership
The project is MIT licensed, exports can be used, changed and shipped commercially, and exported assets belong to the user without conditions.Read 1 Oct 2026 · github.com
Limit: hardware compatibility
Use depends on a browser and graphics stack that expose WebGPU, so unsupported browsers or GPUs cannot run the hosted generator.Read 15 Oct 2026 · m-w-marker.github.io
Limit: mobile availability
The product pages document desktop browser support and do not list iOS or Android applications.Read 15 Oct 2026 · m-w-marker.github.io
Limit: service model
The project publishes no paid tiers, hosted account system, support SLA, security certification or compliance program.Read 15 Oct 2026 · github.com
Local installation
Local use requires Node.js, a WebGPU-capable browser, npm install and npm run dev from the app directory.Read 15 Oct 2026 · github.com
Local use
The project can run locally with Node.js and a WebGPU-capable browser, and its Windows start.bat script runs the setup.Read 1 Oct 2026 · github.com
Package status
The npm package is private, version 0.1.0, and declares only lil-gui and three as runtime dependencies.Read 15 Oct 2026 · raw.githubusercontent.com
Platform requirement
The online version requires WebGPU, such as a current desktop Chrome or Edge browser.Read 1 Oct 2026 · github.com
Preview modes
The tool includes a top-down 2D map, a lit 3D preview and first-person walking mode.Read 15 Oct 2026 · github.com
Road generation
It creates connected roads between towns and exits, routes around steep slopes and water, and applies a maximum grade.Read 15 Oct 2026 · github.com
Roads and towns
It generates connected road networks, towns, map exits, road grades and embankments around water.Read 1 Oct 2026 · github.com
Seed controls
A seed and parameter set deterministically reproduce terrain, and the interface can compare 12 seeds.Read 15 Oct 2026 · github.com
Self-hosting
The repository provides the complete web app source and local Vite commands for self-hosting.Read 15 Oct 2026 · github.com
Sharing and presets
The application supports URL share links, JSON save and load, undo and redo, and built-in terrain presets.Read 1 Oct 2026 · github.com
Technology stack
The project identifies WebGPU, WGSL, three.js r186, lil-gui and Vite as its main technologies.Read 15 Oct 2026 · github.com
Terrain features
Generation includes hills, mountains, cliffs, erosion, rivers, lakes and a raised border ring.Read 15 Oct 2026 · github.com
Terrain output
The generator produces 16-bit heightmaps with cliffs, hills, mountains, erosion, rivers, lakes and a raised border ring.Read 1 Oct 2026 · github.com
Terrain resolution
The default 512 m map produces a 1024×1024 heightmap at 0.5 m per pixel; maps can reach 2560×2560 at 1280 m.Read 15 Oct 2026 · github.com
Texture licensing
The bundled textures are identified as CC0.Read 15 Oct 2026 · github.com
Texture system
Each biome has six automatically placed texture layers, and users can replace the layer albedo and normal images.Read 15 Oct 2026 · github.com
Tool integrations
Road, town and water masks and layout JSON are intended for PCG, Houdini and custom placement scripts.Read 1 Oct 2026 · github.com
Unity export
Unity terrain output is exported as RAW .r16 with Unity row-order handling in the metadata.Read 15 Oct 2026 · github.com
Unreal export
Unreal landscape output supports 16-bit PNG and RAW .r16 files with import metadata.Read 15 Oct 2026 · github.com
Water crossings
Roads avoid rivers and lakes where possible and cross them on raised embankments.Read 15 Oct 2026 · github.com
Windows launcher
The repository includes start.bat to change into app and run the Vite development server.Read 15 Oct 2026 · github.com

Plans and prices

Free Free No install · no account Read 1 Oct 2026 · github.com
Free Free browser-based generator · no install · no account Read 15 Oct 2026 · github.com

Every Heightmap Level Generator plan and price →

Strong points and limits

Strong points

  • Generates 16-bit heightmaps with varied terrain features.
  • Supports Unreal Engine, Unity, Godot Terrain3D and three.js exports.
  • Compares 12 seeds and previews 2D and 3D views.
  • MIT-licensed, with commercial use of exports permitted.

Limits

  • Online use requires a WebGPU-capable browser.
  • Local use requires Node.js and a WebGPU-capable browser.

Who it suits

It suits game developers who need procedural terrain for Unreal Engine, Unity or Godot, and creators who want related road, town and water data for placement workflows. It is also relevant to users who need editable seeds and multiple export formats.

Verdict

Heightmap Level Generator combines terrain generation, editing previews and engine-focused exports in a free tool. Check the WebGPU requirement before relying on the browser version.

Where Specifiction places it

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