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How do I use a subtractive geometry brush?


I'm a beginner on UE4.2 and I don't know how to have a element 'subtraction' when I try to follow the UE4 video tutorial 'Create a level 2'. Anybody has a hint?

Thanks a lot,


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asked Jun 29 '14 at 06:38 AM in Using UE4

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avatar image ymars STAFF Jun 17 '16 at 02:09 AM
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2 answers: sort voted first

Hey widorisan,

To use a Subtractive geometry brush, you only need to switch the Brush Type in the Details panel while the brush is selected. If you position the Subtractive Brush inside an Additive Brush, it will subtract the area from the Additive Brush.

alt text

You can read more about geometry brushes here:


Let me know if you have any more questions!

Ben Halliday

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answered Jun 30 '14 at 05:34 PM

avatar image widorisan Jul 03 '14 at 08:17 PM

Hi Ben,

Thanks a lot!!!


avatar image BaconMonkey Jul 19 '16 at 02:48 AM

Didn't work for me. Has it changed in UE4.12?

avatar image Sean L ♦♦ STAFF Jul 19 '16 at 07:27 PM

Keep in mind that this will only work with BSPs, which are placed in the Geometry section of the Modes tab. If you are using a static mesh, this will not work.

avatar image Zeni241 Apr 20 '18 at 11:42 AM

Thanks for the tip.

avatar image L3dman Aug 03 '16 at 03:50 PM

im stuck with this too cant seem to get it to cut out ,idk what to do :(

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I found that, you need to place your FILL objects first , then add the substraction brush (box, cilinder, etc) . If you add another new FILL box, it will NOT be substracted with the previously added substraction brush.

From official doc > ... "... from previously created additive Brushes."

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answered Apr 28 '18 at 01:24 PM

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avatar image CyzBot Jan 14 '19 at 08:59 PM

Thanks for the help :) I got stuck too...

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