How do we choose the probability for Russian roulette and at what luminance we should involve it at?
How is p_rr selected?
Is it true that in this case we don't bound the number of bounces?
Is p_rr more optimal when its value is large?
I am also confused what this means. If we didn't do this then wouldn't we have E(x/prr)? How does the expected value not change?
Wouldn't this increase the variance?
How do we decide what prr is