How can I use the Subtractive BSP on one Additive BSP Brush, not another?

anonymous_user_e942c2ca
Mon, 05 Aug 2019 13:54:13 +0000
Community & Industry Discussion

Hi,

So I’m making a level in UE4, mostly using BSP brushes at the moment. I have a floor and a wall, both are made from Additive BSP brushes.

I want to create a Subtractive BSP brush on the wall to create a Door, but I do not want this to then subtract from the floor.

In this example, I have a sphere subtractive brush and I only want it to affect the wall (red arrow) not the floor (blue arrow).

Obviously, I could align it up perfectly, but say that there are multiple additive brushes in the vicinity, how do I ensure that this subtractive brush is only subtracting from the correct Additive brush that I want it to?

In a perfect world, I could assign the subtractive brush to one additive BSP, so that anything I place after is not affected by it.

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