I like this illustration of “trim” workflow, but this fundamental assumption violates basic modular building rules.
Specifically, it means that two corridors won’t line up, if one of them goes through a “plus” intersection, and one doesn’t.
You could fix this by making the width be some shared multiple of 3 – perhaps 4.5 meters – and then making both a 3m and a 4.5m corridor bit, or a 3m and a 1.5m corridor bit.
