NetRadiant-Custom

Windows · Mac · Linux

Freedom report

Three barsScore 6.5

  • Free tierA free tier is on its own pricing page
  • Open codeNo open-source code on record
  • Runs widely3 of 6 device platforms
  • DocumentedPlans, terms and facts published

NetRadiant-Custom is a free, open-source, cross-platform level editor for games based on id Tech. Its main focus is Quake, Quake 3, and Quake Live, while releases include configurations for additional games. Ready-to-use packages are available from the Releases section for Windows, macOS, and Linux. The 3D view supports creating and editing brushes and entities, with geometry tools such as vertex editing, brush-face extrusion, patch thickening, and a CSG shell modifier. Texture tools handle UV alignment, drag painting, texture transfers between brush faces and patches, and locking textures during vertex or edge changes. Users can customize shortcuts, interface themes, and fonts. Viewports offer anisotropic texture filtering and optional MSAA. Region mode makes working compilations build only the map area in that region. Bundled Q3Map2 tools include automatic map packaging and BSP import and export as JSON; the Assimp model-loading library supports more than 40 formats. Supported formats include .map, .bsp, .pk3, .dpk, .dpkdir, and several map-definition and brush formats. The project describes its lineage as a fork following earlier GtkRadiant and NetRadiant versions.

Who it is for

NetRadiant-Custom suits people creating or editing levels for id Tech games, especially Quake, Quake 3, and Quake Live. It is available for Windows, macOS, and Linux.

What is good

  • Free, open-source editor for Windows, macOS, and Linux.
  • Supports brush and entity editing in 3D.
  • Includes geometry and texture-editing tools.
  • Offers customizable shortcuts, themes, and fonts.
  • Q3Map2 includes automatic map packaging.

What to know first

  • Main focus is Quake, Quake 3, and Quake Live.
  • Optional MSAA is listed for viewports only.

Verdict

NetRadiant-Custom offers level-editing, texture, and map-compilation tools across three desktop platforms. Its stated main focus is Quake, Quake 3, and Quake Live, with configurations for other games in releases.

NetRadiant-Custom plans and pricing

All plans
Free Free Open-source level editor; ready-to-use packages in Releases github.com · 29 Sept 2026

Compared on game modding tools

Free plan
Yes
Archive extraction
Yes
Mod packaging
Yes
Script editing
Yes
Supported formats
.map, .bsp, .pk3, .dpk, .dpkdir, Valve 220, brush primitives, axial projection, .def, .ent, .fgd
Supported platforms
Windows, macOS, Linux

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