My major research interest is the question of what makes virtual reality work, how is it possible to build virtual environments such that people respond realistically to events within them? What scientific explanations are there of this phenomenon? On the other side I have also lead research on computer graphics aspects of virtual environments, in particular the issue of real-time global illumination. For this work I was supported by an EPSRC Senior Research Fellowship for 5 years from 1999.

I am an ICREA Research Professor at the University of Barcelona, Spain, with several projects and PhD students at at UCL.