[YOUTUBE]http://www.youtube.com/watch?v=HVQN2DpHtjY[/YOUTUBE]
They use 3D mapping to integrate their material with the architecture that they are projecting on.
More videos can be watched on their [URL="http://www.youtube.com/user/easywebfr"]youtube[/URL] page or [URL="http://www.easyweb.fr/en/english.html"]website[/URL]. Their websites worth checking out.