When i use any geometry from BSP with option subtract in happen only invisible, but i cant make holes for dors or windows or other things.Is this bug?
Thank you for fix 
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Hi urkqsrk,
- Does this occur in a clean, blank project with no additional content or is it limited to one project?
- What steps can I take to reproduce this error on my end.
- Did you create the subtractive brush before the additive you are attempting to affect? If so, that is why you are not seeing the results, the last brush affects the brushes created before it.
- If not, do you have “Update BSP automatically” set to true? If not, press build and see if that updates your viewport.
Hi urkqsrk,
We have not heard from you in several days. I am marking this as answered for tracking purposes. If you are still experiencing this error, please comment with the requested information.