Subtracting Extruded Curves uniformly through a surface

Good day,

I would like to ask for help regarding this problem.
For a realistic background, My roof ceiling is curved and I would like to make a grid of gaps through it. Pulling curves does not seem to work since it distorts the original distances of the
grid. (9.2 KB) extrusions query.3dm (35.8 KB)

Thank you for your help.

Is this what you are looking for?

Wow, this is exactly what I was looking for. thanks!
Is it alright if I’ll ask for a copy of the definition?
I’m not too familiar will the other components used.

Just made improvements on the code. Here is the finished render


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