James Turrell (http://en.wikipedia.org/wiki/James_Turrell http://en.wikipedia.org/wiki/James_Turrell) is an interesting artist who plays with these effects and

James Turrell (http://en.wikipedia.org/wiki/James_Turrell http://en.wikipedia.org/wiki/James_Turrell) is an interesting artist who plays with these effects and how they can go from subtle to almost overpowering. Here's a really good interview with him: http://conversations.org/story.php?sid=32 http://conversations.org/story.php?sid=32