Lecture 13: Global Illumination & Path Tracing (44)
weiji-li
Does this formula already account for the discounted factor? Usually, we might have a discounted factor on this kind of formula so that we will not get infinity for the result. In this case, does the K already account for the discounted factor, which means the light will always be weaker after 1-bounce?
Zc0in
Yes, every reflection will weaken the radiance. The sum will be bigger but we don't need to worry about it to go infinite. And most time we just use the former ones, since too many bounce is not necessary.
Does this formula already account for the discounted factor? Usually, we might have a discounted factor on this kind of formula so that we will not get infinity for the result. In this case, does the K already account for the discounted factor, which means the light will always be weaker after 1-bounce?
Yes, every reflection will weaken the radiance. The sum will be bigger but we don't need to worry about it to go infinite. And most time we just use the former ones, since too many bounce is not necessary.