We'll be making a black room with Flourscent dots all over the walls and have a person covered with a black cloth painted with the dots in the room.
Adendum: This was an email to me sent from Nick Collins about a more efficent way to do the 'dots':
"I was pleased to hear that Gesso worked for your polka dot room, but in the past, I have saved LOTS of time and effort by going to Wal-Mart or an art supply store and buying a package of round "yard sale stickers". They are about 1" in diameter and come in neon colors such as yellow, pink, blue and orange. In my haunt, I bought 2 packs for about $3 and that gave me about 1000 stickers. They stick to almost anything and go up really quick. You'd just have to test to see if they stick reasonably to your fabric. I understand that if you wanted to use the panels year after year, that the paint may be a better way to go. Just thought I'd let you know another option :)"