Distribution ray tracing is not exactly pathtracing. Proper physically correct pathtracing was formulated by James Kajiya in this paper: http://www.cse.chalmer

Distribution ray tracing is not exactly pathtracing. Proper physically correct pathtracing was formulated by James Kajiya in this paper: http://www.cse.chalmers.se/edu/year/2011/course/TDA361/2007/rend_eq.pdf http://www.cse.chalmers.se/edu/year/2011/course/TDA361/2007/...