2015-02-14 "smallppm" and "gpusppm" by bee smallppm ( Small Progressive Photon Mapping ) With comments http://www.ci.i.u-tokyo.ac.jp/~hachisuka/smallppm_exp.cpp Short http://www.bee-www.com/smallppm.cpp gpusppm( GPU Stochastic Progressive Photon Mapping ) http://www.bee-www.com/gpusppm2.zip