Hello, I did what Mike described.(I think...)
I set in preferences panel :
floor = 25 cm
height of new walls = 0,1 cm
then I made a stack of rooms.
export all of them in one unique OBJ format.
In a new project import the terrain as furniture. (and change the preferences to standard values)
Put the house at elevation corresponding to the height of terrain.
I would like to be able to make a bevel in order to avoid these stairs...but I don't know how...
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MacMini 3GHz Intel Core i5 6 cores 64Go macOS Big Sur 12.2.1
