Another Creators Project video, this time from Germany:
The installation consists of 21 high-powered projectors inside a really, really big gas tank, projection-mapped onto the surface. They also play sound in the space, which due to the acoustics and sheer size of the room, echos for about 20 seconds. This video, sadly, doesn’t go into how the projection-mapping was accomplished on that scale, but it’s still a very interesting use of that technology.