NetRadiant-Custom

At a glance

• Editor score
  7.9 / 10
• Pricing
  Free plan
• Best for
  Cross-platform Quake 3 map modding
• Free plan
  Yes
• Paid from
  Free
• Archive extraction
  Yes
• Facts checked
  20 Sep 2026

• Where it wins

  • Detailed brush, vertex, UV, entity, and texture editing tools
  • Map compilation and configurable build commands
  • Automatic Quake 3 map packaging with broad format support

• Where it doesn't

  • Focused mainly on Quake, Quake 3, Quake Live, and similar games
  • No AI-assisted features
  • Desktop software rather than a browser-based editor

Our verdict on NetRadiant-Custom

NetRadiant-Custom is an open-source desktop level editor for id Tech-based games, with a particular focus on Quake, Quake 3, and Quake Live. It is suited to modders who want to create and refine maps on Windows, macOS, or Linux. The editor combines 3D viewport work with brush and entity editing, vertex, edge, face, and clipper-point manipulation, UV alignment, texture and model browsing, shader editing, and compilation utilities. Configurations for other supported games are also included.

Its strongest area is the depth of its map-authoring workflow. CSG shell modification and brush extrusion support construction work, while UV tools, texture browsing, and a simple shader editor cover visual refinement. Map compilation and configurable build commands keep build steps within the editor, and automatic packaging for Quake 3 supports a direct path from map work to a distributable package. Supported formats include .map, .bsp, .pk3, .dpk, .dpkdir, Valve 220, brush primitives, axial projection, .def, .ent, and .fgd.

NetRadiant-Custom is a strong fit for creators who want free, open-source tooling with native support across three desktop operating systems and a workflow centered on Quake 3 modding. Its focus is narrower than a general-purpose game development environment, and it does not include AI features. Buyers looking for detailed brush-based editing, compilation controls, and automatic Quake 3 packaging should find its scope well aligned; those seeking a browser editor, broader engine coverage, or AI-assisted creation should choose a different type of tool.

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NetRadiant-Custom pricing

NetRadiant-Custom fact sheet

Alternatives to NetRadiant-Custom

• StarCraft II EditorA broad free toolkit for building, scripting, testing, and publishing StarCraft II content.9.4
• DWDota 2 Workshop ToolsA complete free toolkit for building, testing, and publishing Dota 2 mods.9.2
• OpenMW-CSA free, open-source editor for deep OpenMW mod and game authoring.9.0

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Featured on iTechGuides

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update