How do I fix BSP distortion and Holes?

In my map I’m building, I have a structure with a triangular roof. I duplicated the roof and set it above the original and I got this problem:

I then made grabbed a new BSP from the list and made it smaller and placed it on the top of the triangle and made it subtractive and I got this:

Is there anyway to fix this at all? ( btw, I’m just starting out in unreal and I have much to learn) Also, I’m running windows 10 on my Mac Air…

Hi MIKKAZX,

This is a known issue and has been reported as UE-12157. Unfortunately at present there is no known workaround.

No worries, thanks anyway :slight_smile: