Mapgen4

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

WeightsClosed

About

Mapgen4 is ranked #2 of 27 in game map generators on Inferse. It runs on Self-hosted, Web.

Compared on game map generators

Free plan: Yesredblobgames.com
Generation method: proceduralredblobgames.com
Map dimension: bothredblobgames.com
Seed control: Yesredblobgames.com
Export formats: PNGredblobgames.com

Facts

Purpose: Mapgen4 is a procedural wilderness map generator where users paint mountains, valleys, and oceans and the simulation generates biomes and rivers.redblobgames.com · 2 Oct 2026
Terrain style: It aims for a hand-drawn-inspired look, rendering terrain in 3D with a custom projection and outline.redblobgames.com · 2 Oct 2026
Controls: Users can adjust simulation and style sliders, including rainfall and river-flow settings.redblobgames.com · 2 Oct 2026
Export and usage: The page offers a high-resolution image download and says users may do as they please with maps they create; credit is appreciated but not required.redblobgames.com · 2 Oct 2026
Project status: The maker describes the project as finished and mostly inactive, with code changes made in April 2023.redblobgames.com · 2 Oct 2026
Download and local use: The repository provides the source code and instructions to build it with npm or pnpm and run it locally in a browser.github.com · 2 Oct 2026
Code license: Mapgen4 and its helper libraries are licensed under Apache v2, and the maker says they can be used in commercial projects.github.com · 2 Oct 2026
Limits: The maker says rendering parameters are designed to look best around 25,000 Voronoi cells, although the underlying code can support more than one million.github.com · 2 Oct 2026
Unbuilt features: The maker lists drawing rivers, sphere output, resources, towns, forests, names, roads, and nations as features that could be added in a future project.github.com · 2 Oct 2026
Support: The Mapgen4 page provides the maker’s email address and invites interested people to email about extending the project.redblobgames.com · 2 Oct 2026
Audience: Red Blob Games says its main audience is independent, student, and hobbyist software developers.redblobgames.com · 2 Oct 2026
Security and compliance: The opened Mapgen4 page and repository do not state any security or compliance certifications.redblobgames.com · 2 Oct 2026
Purpose: Mapgen4 is a procedural wilderness map generator.redblobgames.com · 3 Oct 2026
Terrain editing: You choose a starting seed and paint mountains, valleys, and oceans on the map.redblobgames.com · 3 Oct 2026
Simulation: The generator simulates evaporation, wind, and rainfall to determine biomes and rivers.redblobgames.com · 3 Oct 2026
Style: Its 3D rendering uses a custom projection and outline intended to give the map a hand-drawn look.redblobgames.com · 3 Oct 2026
Controls: Sliders let you change the simulation and map style.redblobgames.com · 3 Oct 2026
Export: The page offers a high resolution image download and says it does not work on all platforms.redblobgames.com · 3 Oct 2026
Usage rights: The maker says anything created with the tool is yours to use as you please, and credit is appreciated but not required.redblobgames.com · 3 Oct 2026
Project status: The maker describes the project as finished and mostly inactive.redblobgames.com · 3 Oct 2026
Source code: The source is available on GitHub, and the README says Mapgen4 and the maker's helper libraries are licensed under Apache v2 for use in commercial projects.github.com · 3 Oct 2026
Local use: The README gives build instructions and says to run a local HTTP server and visit embed.html in a browser.github.com · 3 Oct 2026
Limits: The README says the code can support over one million Voronoi cells, while rendering and other parameters are designed to look best around 25,000 cells.github.com · 3 Oct 2026
Planned omissions: The maker lists drawing rivers, sphere output, natural resources, towns, forests, names, roads, and nations as features left for a future project.github.com · 3 Oct 2026
Support: The Mapgen4 page invites users to email the maker or comment on the page.redblobgames.com · 3 Oct 2026
Maker: Red Blob Games identifies Amit Patel as its maker and says he makes interactive visual explanations of math and algorithms.redblobgames.com · 3 Oct 2026