I am confused. Is p_rr some free paramter, or something we need to find out?
elenagong
What is zero in the bracket of the second expected value?
Ken
Zero is just zero I guess. We just ignore it.
motoole2
We use Russian roulette parameter to cull light paths. 1-p_rr is the probability that we cull that light path, and can be chosen in a number of ways (e.g., set to a value that depends on path length). But in order for our estimator to do the right thing, we need to take this probability into account (i.e., reweight samples by p_rr).
Regarding the zero in the brackets, the zero represents the contribution of culling light paths. So the second term is just zero.
I am confused. Is p_rr some free paramter, or something we need to find out?
What is zero in the bracket of the second expected value?
Zero is just zero I guess. We just ignore it.
We use Russian roulette parameter to cull light paths.
1-p_rris the probability that we cull that light path, and can be chosen in a number of ways (e.g., set to a value that depends on path length). But in order for our estimator to do the right thing, we need to take this probability into account (i.e., reweight samples byp_rr).Regarding the zero in the brackets, the zero represents the contribution of culling light paths. So the second term is just zero.