Is there a way to make a hole in the wall without using csg?

The picture above uses csg to make a hole the size of a window on a white wall.
I’m looking for another way because the computation is too hard when csg becomes complicated. I’ve looked for ways to use shaders or Stencil, but it doesn’t work as well as I thought. Is there anyone who can help me?

Welcome aboard!

The two threads linked here may help:

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Thank you for your answer. This solved my problem.