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Projects / Anvil CSG

Anvil CSG · Free Beta 2

Brush-based level editing, right inside Unity.

Block out, shape, texture and build your maps without leaving the editor. If you've used Hammer or TrenchBroom, you'll feel at home.

Download free beta Documentation
Free beta Unity 6.3 Built-in & URP ★ 166 GitHub stars

Features

From an empty scene to a finished, lit level, without leaving Unity.

Views
Top, front, side and 3D
Shapes
Box, wedge, cylinder, stairs, arch
Tools
Clip, carve, hollow, bevel
Editing
Face, edge and vertex
Textures
Material paint, UV alignment, texture lock
Build
Meshes, collision, lightmap UVs
Requires
Unity 6.3 · Built-in or URP · Windows
Download free Beta 2 Documentation

Full version is coming to the Unity Asset Store.

Getting started

New to Anvil? This tutorial walks through making your first level, from the first brush to a built map.

Watch on YouTube →

Pressing play loads the video from YouTube.

Updates

All posts →

Changelog

All releases on GitHub →
  1. Beta 2 update
    • Fixed game builds failing with lightmap and light probe errors (scaleInLightmap, receiveGI, stitchLightmapSeams, LightProbeGroup.probePositions).
    • Checked with a Windows player build on Unity 6000.3.10f1.
    • New export of the download to fix an import problem. The package is now Anvil21.unitypackage.
    • Unity 6.3 only. No new features.
  2. Beta 2
    • Free preview of brush-based level design inside Unity, inspired by Hammer and TrenchBroom.
    • Top, front, side and perspective views. Boxes, wedges, cylinders, stairs and arches.
    • Clip, carve and hollow, plus face, edge and vertex tools. Material painting, texture alignment and texture lock.
    • Groups and layers, map output generation, a Preflight check before Build Map, and a demo scene.

FAQ

Which Unity version do I need?

Beta 2 needs Unity 6.3 (tested on 6000.3.10f1). The upcoming paid version is planned for Unity 6.0 to 6.7. Check the version range on its Asset Store page when it's out.

Does it work with URP or HDRP?

Anvil CSG works with the Built-in render pipeline and URP. HDRP isn't supported.

Can I use it in a commercial game?

Yes, Beta 2 can be used in your games, commercial ones too. Put "Made with AnvilCSG" in your game's credits or the docs that come with it. No splash screen or watermark needed. You can't modify, repackage, sell or redistribute Anvil's code as a tool, and it isn't open source. The full terms are in LICENSE.md in the download.

How is it different from ProBuilder?

Anvil CSG is a brush workflow, like Hammer or TrenchBroom. You build levels from convex brushes and shape them with clip, carve and hollow, plus face, edge and vertex tools, while you work in top, front and side views next to the 3D view. Your map stays editable as brushes, and a Build Map step turns it into the output your game uses.

What does Build Map make?

It turns your brushes into regular Unity meshes. The editable brush map stays in your project as the source, so you can keep changing it and build again.

Does it work on Windows, Linux and Mac?

The full version works on Windows and Linux. Mac isn't confirmed yet. In Beta 2 the bundled lightmap UV plugin (xatlas) is Windows only.

Will my Beta 2 levels work in the paid version?

That isn't promised. Beta 2 is an older free preview, and it doesn't include a licence or a free upgrade for the paid version.

Is it free? What will the full version cost?

Beta 2 is free. The full version is coming to the Unity Asset Store for $20, with a launch price of $14 for the first two weeks. There's no launch date yet.

Where do I get help or report a bug?

On the Discord. The documentation and the tutorial video cover the basics. Beta 2 doesn't come with support, so bugs in that old build may not get fixed.

Questions or bugs?

Ask on the Discord or send me an email. I read everything.

Join the Discord simon@2yeet.com

Writing about Anvil CSG or making a video? The press kit has texts, screenshots and logos.