OK. Lemme do this in MSPaint. I have no other way to show this:
THE BOXY MAPPER:
STAFFSABERIST'S RIFT TECHNIQUE
Thank goodness I have Drafting class. I can do this kind of thing in paint.
Actually, Raven did this, I believe. They built the basic archi, then made the outer walls around it. So it isn't really my idea. But it is one I will adopt in these open areas.
And you know, there just aren't enough SP levels out there.