Before, he was a senior scientist heading a research group in the Cluster of Excellence (Saarland University / MPI Informatik) until December 2009. He studied Mathematics (Cologne) and Computer Science (Ecole Normale Superieure Paris). He obtained a Master's (2004) and PhD. degree (2008) in Mathematics / Computer Science from Grenoble Universities. He worked at MIT (2003), UIUC (2006), and Adobe (Seattle - 2007, Boston - 2008). His interests include real-time and perceptual rendering, alternative representations, shadow algorithms, global illumination, and GPU acceleration techniques. He published several articles at various conferences, book chapters, and journal papers. He was local organizer of EGSR 2010 and received the Eurographics Young Researcher Award in 2011.