Btw.. working on my next project:

"Light projectors for Spotlights"

They will work in 3Delight and Reality/Luxrender. Simply explained they are Spotlights with a shadow-mask in front of them on which you can load several patterns/images in the opacity channel. A preview camera will make it possible to see exactly where light and where shadow will be in the scene using the viewport.

(Those of you who can remember my "SCS" freebie know what to expect.)

Preliminairy tests are hopeful.. :)