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Q3Edit

Browser-based level editor for Quake III Arena with AI-assisted map authoring

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What it does

About Q3Edit

Q3Edit is an open-source, in-browser map editor designed for Quake III Arena. It allows users to create and modify game levels directly within a web browser, supporting traditional brushes, patches, terrain, and entity placement through a four-view interface familiar to those who have used Radiant-style editors. The tool compiles maps using id Software's original q3map algorithm compiled to WebAssembly, and can instantly launch finished maps in a browser-native version of ioquake3. Integration with AI coding agents like Claude and Codex enables users to describe maps in natural language while observing live editing changes in real time. The project is free and open-source, requiring only WebGL2 support and including built-in OpenArena assets so no external game files are needed.
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