Hi, Is there a way of handling a ceiling that has heating ducts running under it? In this case, my basement has 1/3 of the height lower than the rest to accommodate the drop. If I set the walls at each end to the correct heights (splitting) I seem to confuse everything. I get sloping ceilings but of course I need squared surfaces.

i.e. -----|_____|----- if that makes sense.

Any ideas?

Martin