I've just recently completed an audio visual mapping installation in Exeter, UK. I took a photo from the projectors locked off position a couple of months before starting my work in after effects.
Using the photo as a guide I made all the animations fit and work with the buildings structure. The installation focus's on the main entrance of the Exeter Phoenix Arts Center. An 8 minute loop was sequenced in fcp to an audio score produced by DJ Jusme. The final edit was outputted using modul8 to an HD projector and wireless speakers.