I want to cut holes in my object using another object to create windows, but when I apply boolean modifier which should work it doesn't. I get these weird lines all over my object and nothing happens(at least not what should happen) see picture and blend file below: enter image description here


1 Answer 1


i think you wanna do this:

enter image description here

  1. delete your boolean modifier on cube.001
  2. add boolean modifier to cube -> choose cube.001 as object
  3. choose fast
  4. hide cube.001 in viewport

to cut out all:

put all in one collection and use this:

enter image description here

  • $\begingroup$ thanks that worked $\endgroup$
    – DraugR
    Commented Apr 3, 2022 at 15:05
  • $\begingroup$ i updated my answer. Please click on the checkmark left of my answer, if it helped you. Thanks. $\endgroup$
    – Chris
    Commented Apr 3, 2022 at 15:06
  • 3
    $\begingroup$ On top of the issue Chris has pointed out, you should be aware that the top part of your windows have bad topology, as you can see: i.imgur.com/tXgW832.png It's not manifold (watertight). That's why the Exact mode is acting up. Fast mode will ignore such things to a degree, but you could end up having to deal with it sooner or later. $\endgroup$
    – Kuboå
    Commented Apr 3, 2022 at 15:11

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