Anthony Appleyard opened this issue on Apr 07, 2016 ยท 9 posts
bagginsbill posted Mon, 18 April 2016 at 9:37 AM
If I move one box .1 inch so that there are no longer any co-planar faces, the shadow artifact is gone. But the double-density scattering within the intersection is not how you expect a merged volume to work. Like I said - unsophisticated.
SuperFly (Cycles) is not actually "physically based" no matter how many people keep repeating that. It is not simulating the movement of photons one by one. It is using statistical approximations with certain simplifications, and these techniques are going to show flaws if you push them beyond the scenarios they're intended for.
Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)