How to create windows

I’m sorry if this may come off as a stupid question, but how do you create windows? I’ve tried with the architecture, but it doesn’t deliver exactly how I want it. Box brushes don’t help either, as even when I insert a subtractive box brush into an additive one, yet it never creates an empty space for the box. Any tips?

Try using Blender

Err… you’re eventually going to want to create assets using a 3D program like Blender or Maya. You may find it more intuitive there.