Lecture 13: Global Illumination & Path Tracing (42)
gowenong
The summation equation comes from sum of a geometric sequence, where a+ax+ax2...axn=(1−x)a(1−xn). In this case, a=1 and n approaches infinity (thus xn approaches 0 when ∣x∣<1), so this expression simplifies to 1−x1
greeknerd1
How much energy is decreasing at every bounce? Is it K?
The summation equation comes from sum of a geometric sequence, where a+ax+ax2...axn=(1−x)a(1−xn). In this case, a=1 and n approaches infinity (thus xn approaches 0 when ∣x∣<1), so this expression simplifies to 1−x1
How much energy is decreasing at every bounce? Is it K?