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Question by HauntedHotPocket · Jan 17, 2016 at 10:45 PM · geometrycutoutholecut

Cut a hole in geometry similar to UDK/bsp?

Unity is great but one very useful feature would be the ability to cut a hole into basic geometry for grayboxing, similar to how it works in UDK with BSP geometry to quickly carve into an existing level while designing.

Is there a way to do this in Unity without coding? Again, similar to UDK.

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Answer by Bunny83 · Jan 17, 2016 at 11:27 PM

Look up Constructive Solid Geometry (CSG). It's what most of those editors use. I don't really know the Unreal editor (just a bit the old UnrealEd from the first Unreal ^^), but i know that Valves Hammer editor (formally Worldcraft) partially uses CSG brushes for some features.

Here are some CSG approaches in Unity:

  • http://forum.unity3d.com/threads/constructive-solid-geometry-csg-in-unity.125861/

  • https://github.com/omgwtfgames/csg.cs

  • https://www.reddit.com/r/Unity3D/comments/31jsfn/pb_csg_a_free_boolean_operations_csg_library_for/

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avatar image Bunny83 · Jan 17, 2016 at 11:31 PM 0
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That said i should add that CSG is not as easy to calculate as it is to work with. Most such libraries have their limitations and can even produce errors in the geometry.

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Answer by logicalerror · Jan 09, 2017 at 01:44 PM

You might be interested in https://www.assetstore.unity3d.com/en/#!/content/69542 which is an UDK like (brush based CSG) level design tool. There's an evaluation version available here https://logicalerror.github.io/evaluate.html

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