nerd opened this issue on Jul 13, 2015 ยท 554 posts
bagginsbill posted Mon, 10 August 2015 at 3:17 PM
There seems to be confusion about PBR being slow. The implementation of PBR is not slow - it is the implementation of unbiased rendering that makes things slow.
PBR in game engines is faster than any render we work with. It's not the cost of calculating a reflection strength based on Fresnel rules that matters - frankly that's practically for free. What's costly is firing off additional rays to simulate diffuse reflection from a 360 environment, which Firefly IDL + IC dramatically avoids. But that's "biased" rendering, which cheats constantly in order to gain speed.
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)