If it must be 3d and you want to repeat it around fairly easily, you could save your slabs as a custom curtain wall panel and make a curtain wall grid with empty panels and filled panels with your custom panel. That's the quickest 'dirty' fix I can think of that doesn't require using the wall accesoires addon and some fancy programming.
You could set up a little 3D work shop on a separate story somewhere below your model and try out different combinations there and saving them as panels.
Erwin Edel, Project Lead, Leloup Architecten
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