One of the techniques he likes to use is called the Orton technique. Named after Michael Orton the first person to do it by sandwiching two slides together. One in focus and over exposed, and one out of focus exposed properly. Andre has taken it to a new level and has made it all his own. He refers to them as "Deamscapes"
I thought i would try it with some of my Nova Scotia images :)
Here is a great description of this technique written by Darwin Wiggett