Thomas Strothotte is professor of computer science at the University of Magdeburg (Germany), where he founded undergraduate and graduate degree programs in computational visualistics. He studied at Simon Fraser University, the University of Waterloo, and McGill University. He has held teaching and research appointments at INRIA Rocquencourt, the University of Stuttgart, Free University of Berlin, and the former IBM Scientific Center in Heidelberg.Stefan Schlechtweg is assistant professor at the University of Magdeburg (Germany), where his teaching and research areas are computer graphics and interactive systems. He received his Ph.D. from the University of Magdeburg in 1999.