You know what?...
After that stupid post above, I tried to come up with a way to "project" a LED display. I picked up a photographic lens (Nikon 50mm 1.8f) opened up the aperture to the fullest, placed the rear lens element over a lit power supply's green LED. By adjusting the distance between the rear element and the LED, I could get a pretty clear, enlarged green LED on the ceiling and walls.
Now, take the smoke screen idea, but substitute that for a few "water screens", say 3 not too far from each other. Take 3 small color graphic displays place a lens over each one that's controlled by a pair of stepper motors, and you're in for some pretty psychedelic stuff. You can move light around, and probably get a convincing 3D effect by making transitions front-to-back and vice versa
Not sure it's the kind of project you're looking for for a final year engineering project though...
:lol: