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One thing that I realized is that when the random selected light happens to be behind the point that is being evaluated the potential contribution is 0, and therefore the sky will be selected with a probability of 1. This sounds like you are mixing up the sampling probability with the contribution ...

Yes, the EXCELL and the B. Pradhan paper (I only read the first) explore in essence the same idea as we do - a non-uniform space subdivision into AABBs. If we would start the initial subdivision from a single cell instead of a grid, we will end up with the same structure after merging. Because of th...

Following up the discussion from the "glitch pictures" thread: But it is essential that you guys reference the EXCELL (Tamminen et al.) data structure papers in future publications. It is the exact same acceleration structure even if the construction method might not be the same. ... As wi...

We did profile our build times with nvvp, which is why we are confident that any speed-up to the initial creation of the triangle-cell references will not result in noticeable improvement of the build times. The top-level grid we create is much too sparse for that. You can try the code and see for y...

Hi, I tried to create a new topic and post a reply there several times already, but without success. Sorry for carrying this thread further off-topic. It is great to see that our paper received attention from members of the forum. Myself and Arsene will be happy help anyone who is interested in expe...

Hi all, some forum members have shown interest in our paper on irregular grids. Since there are some concerns that we can quickly address, and to keep things organized, I am starting a new thread here. The paper is available at http://kalojanov.com/data/irregular_grid.pdf . On the same page you can ...