Alexander Keller is a director of research at NVIDIA. Before, he had been the Chief Scientist of mental images, where he had been responsible for research and the conception of future products and strategies. Prior to industry, he worked as a full professor for computer graphics and scientific computing at Ulm University, where he co-founded the UZWR (Ulmer Zentrum für wissenschaftliches Rechnen) and earned an award for excellence in teaching. Alexander Keller belonged to the team that received a technical achievement award for the rendering software mental ray in 2003. Nowadays, the quasi-Monte Carlo methods developed by Alexander Keller and his collaborators are used all over the movie and rendering industry. Recent research interests include reinforcement learning and its relation to integral equations.