Pixel (Link is in French, which I do not speak.) is a an interactive dance event that uses projection-mapping to create some very impressive illusions. It bills itself as “a work on illusion combining energy and poetry, fiction and technical achievement, hip hop and circus” and from the video below, I’d say that “technical achievement” is a bit of an understatement:
Pixel – extraits from Adrien M / Claire B on Vimeo.
I don’t have the technical details, but my guess is that this is done with a system that tracks the actors in conjunction with some pretty tight timing. My favorite moment occurs at around 1:11, when the projection appears to “fall”. A wonderful example of combing digital art with the human element if there ever was one.