Laurent Lucas currently leads the SIC research group and is in charge of the virtual reality platform of the URCA (University of Reims Champagne Ardenne) in France. His research interests include visualization and co-operation between image processing and computer graphics, particularly in 3DTV, and their applications. Céline Loscos is Professor at the URCA, within the CReSTIC laboratory, and teaches computer science at the University Institute of Technology (IUT) in Champagne Ardenne, France. Yannick Remion's research interests include dynamic animation, simulation and co-operation between image processing and computer graphics as well as 3D vision.