This is the first attempt. The skew is off a bit but you get the idea. I think if I added blue (day for night) to the building I could sell the night a bit more but this will affect the color behind the projected image as well. Also as mentioned if I were to use a bigger building it too would add to the effect.
I would love to create some 3d elements (even the building) but when using "light transmission" to project the 'projector image' it doesn't transfer right- I don't know how else to project the image other than with "light transmission."
It will be used to introduce a small amateur film festival so it doesn't need to blow everyone away but to look semi-realistic or impressive would be great. I knew Blender years ago but have never used Maya or Lightwave.
I thought about adding some focus adjustments to the projection as well as (if it stays a 3d environment) move the camera in 3d space just a bit. I also thought about adding some dust particles being illuminated now and then- but I think I'm getting ahead of myself.
I would like to brighten the scene but then I fear losing the projection effect.
As far as detail, I wouldn't be concerned with bricks being dimensional but window sills or especially edges of buildings, etc would be neat to distort the image. Using a combination of 3d layers and a mesh I am able to trick the perspective a little (but is still off a bit).
Any more ideas or suggestions?