Importance-driven Stochastic Ray Radiosity

Optimal Absorption Probabilities for Random Walk Radiosity

“…The survival (or nonabsorption) probability on a patch has been usually considered equal to its reflectivity. An exception to this survival probability is found in [8], where the received importance was considered instead of the reflectivity. In [10] we find also a short discussion under the term of survival biasing (although the form factors were nondiscrete).…”

Random walk radiosity with generalized absorption probabilities

“…This is useful in a scene alike the one in Figure 1. This case can be considered the dual of the one given in [8].…”

“…If we make the survival probability proportional to received importance, that is, i I i , V i , where the V i is the initial and I i the total importance [8], we will assure that the paths will survive in patches which are important to the selected ones. This could be used to drive a random walk in a scene alike the one in Figure 2, the dual of Figure 1.…”

“…This could be used to drive a random walk in a scene alike the one in Figure 2, the dual of Figure 1. This case was the one considered in [8], although there a breadth-first strategy was used, instead of the considered here, which is depth-first.…”

“…The survival (or not absorption) probability on a patch has been usually considered equal to its reflectivity. An exception to this survival probability is found in [8], where the received importance was considered instead of the reflectivity. In [10] we find also a short discussion under the term of survival biasing.…”