Mattias Roupé is a researcher at the Division of Construction Management at Chalmers. Mattias has his main focus on the ITC and digital representation such as Building Information Model (BIM) and 3D-GIS in urban planning and building design. His Ph.D. study researched the development and implementations of Virtual Reality (VR) for decision-making in urban planning and building design. His research contains both social and technical related research. The human associated research is related to: perception, human information processing, communication and decision-making connected to the VR medium. The technical related research is related to: computer graphics, visualization, Building Information Modelling, 3D-GIS, 3D city modelling, related to the VR medium.