Before returning to the State Key Lab of CAD&CG, Zhejiang University in Apr. 2010, I spent a happy five years in the Internet Graphics Group, Microsoft Research Asia, first as an intern then as an associate researcher. I received my Ph.D degree in computer science from Zhejiang University in March, 2007. I also hold a Master's degree in mechanical engineering and a Bachelor's degree in information engineering, both from Zhejiang University. My research interests include real-time rendering of soft shadows and participating media, spherical harmonics for real-time rendering, and real-time global illumination on GPUs. My Ph.D thesis (in Chinese, with English abstract) is about precomputation-based methods in interactive global illumination. During the past several years, I've been really fortunate to work with ZHOU Kun, John Snyder, HUA Wei, HOU Qiming, SUN Xin, GONG Minmin, GUO Baining, BAO Hujun, WANG Rui, Steve Lin, Peter-Pike Sloan, LIU Xinguo, Harry Shum, LI Tengfei and CHEN Lu on the interesting graphics projects below. That's really a lot of fun. For more details, visit my homepage at http://www.zren.info