Optimal absorption probabilities for random walk radiosity
In this paper we study random walk estimators for radiosity with generalized absorption probabilities. That is, a path will either die or survive on a patch according to an arbitrary probability. The estimators studied so far,the infinite path length estimator and the finite path length one, can he considered as particular cases. Practical applications of the random walks with generalized probabilities are given. A necessary and sufficient condition for the existence of the variance is given, together with a heuristic to be used in practical cases. The optimal probabilities are also found for the case when we are interested in the whole scene and an equal to the reflectivities. (C) 2000 Academic Press.
random walk radiosity variance monte carlo