Bruce Walter Sebastian Fernandez Adam Arbree Kavita Bala Michael Donikian Donald P. Greenberg Implementing lightcuts. 55 2005 SIGGRAPH Sketches https://doi.org/10.1145/1187112.1187177 conf/siggraph/2005sketches db/conf/siggraph/siggraph2005sketches.html#WalterFABDG05