It is actually fairly simple, now that the software is available to implement the ideas. You start with a very accurate image of a building, and draw an accurate digital Architectural Map of it(basically a blueprint)using paths. Then you can use the building as a backdrop to project images precisely lined up with the architectural features of the building. The easy way is to simply project non architectural moving images on a building. The "geeky" way is to create blobs of light, and animate them to music in various ways along various path to outline, highlight and color parts of the building, deform it, make drawers come in and out"a la Dali".
Ideally, the show takes place in total darkness, so the building disappears when the projected image is black. You can then really give the illusion that the building tumbles down to a pile of rubble, burns down, rebuilds itself. Anything is possible, people can appear in the windows, in front of the building, birds fly by, the imagination is the limit.
Of course, all of that has to be animated at a minimum of 25 frames per second, using mostly Adobe After Effects. I have a 2500 lumen projector that is fine to project an 8' x 6' image in a darkened room. But I quickly realized that projecting outside on a 30 foot tall building without total darkness required another league of equipment… An 18,000 lumen HI DEF 1080p projector like the Christie Roadster HD18K costs in the neighborhood or $130,000, and rents for about $2200 a day. A large building would require breaking up the image between several projectors. So unless the projectors are supplied by sponsors, this kind of show is all but impossible for the little guy like me… But since the Red Cross say they will supply the equipment, I am going with it.
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