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Thanks! It's true. I had the impression that there needs to be another factor 1/p_surf. But you are right. I made a quick implementation in python https://github.com/DaWelter/ToyTrace/blob/master/misc/deltatracking.py. It seems to work fine as you say, with the minor exception that I take 1/P_s inst...

Hello, I read the recent paper on Spectral and Decomposition Tracking by Kutz et al. http://drz.disneyresearch.com/~jnovak/publications/SDTracking/index.html I want to use weighted tracking methods in my own toy path tracer. Following the PBRT book pg 889, the incident radiance is composed of two te...