Nightfall in Frankfurt. As dusk envelops the city, one of the tallest buildings in town lights up with the saturated dichroic colors of 80 ETC Irideon AR500s. From 6pm until 5am, a changing palette bathes the Dresdner Bank tower with slow fades. The occasion is the launch of Deutsche Telekom on the stock market, and the production company for the event is Satis & Fy, a Frankfurt-based firm that specializes in high-tech corporate presentations.
"The bank wanted to do something spec