3D city model with no windows

Hej there, I am new to this community, so forgive me if the question is in the wrong category.
I am modeling the harbourfront of a city and I have received from the municipality a basic volumetric model to start with. Now I would like to launch a few aerial renderings but the buildings (volumes) looks so cubical… thus I was thinking to add a layer of windows to the facades. If I do that manually it would take me ages, so here the question, does anyone of you know a way in grasshopper to build up windows automatically on the facades constraining the windows inside the area surface (being the facades all different of course)?

See this

and this

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