MikeR777: That's amazing! You should really go in for some serious theatrical design work. You could make a fortune with those sorts of designs.
This is exactly the sort of thing I was looking to do. I can use this as a pattern to create my own design.

<t>Emmanuel: You could call it a mezzanine of sorts, I suppose. It is the same idea as a room that overlooks another without an actual window, so BDFD's suggestion might work... it only needs a small retaining wall.<br/>
Veroniq: I had thought of boxes, but I need them to be slighty odd shapes ...

<t>I am trying to design a home cinema with multiple floor levels (seats on different steps) and a gallery with viewing to the level below. I have been unable to find a way to create a level without having four walls (I want one wall to be absent/very low, to view through/over). Is this possiboe, or ...