I have an interior office drawn in SU, I have some desks and chairs I got off the google SU component site to help fill my office (purely just to make my rectangular room look like it's actually something)...
This model is showing how a aspirating smoke detection system can be installed with a drop ceiling in a typical office setup and how unnoticeable it can be. (Aside from the obvious orange piping and such).
Anyway, I have a projector mounted on the ceiling and was wondering how I could make it look like it's casting light with a picture onto a screen? I am going to photoshop what I mean and post it in a few minutes. I'm assuming in order to do this and make it look real I'm going to have to pursue some type of rendering program huh?
Give me a few minutes and I'll post my work.