Jason L. Mitchell, Gary McTaggart, Chris Green. Shading in valve's source engine. In John Finnegan, Dave Shreiner, editors, 33. International Conference on Computer Graphics and Interactive Techniques, SIGGRAPH 2006, Boston, Massachusetts, USA, July 30 - August 3, 2006, Courses. pages 129-142, ACM, 2006. [doi]
Abstract is missing.