evanrudefx Posted October 4, 2020 Share Posted October 4, 2020 (edited) Hello, I cant figure out how to render this shot without lots of noise. I am getting ridiculously harsh noise from my hdri reflection off my objects. I turned on image planes to confirm the noise is happening in direct reflect. things I tried: 1. reflection quality-little to no difference 2. sampling quality on light-little to no difference 3. pixel samples- I cranked it all the way up to 10 and it looked better, but was still noisy and took way too long to render 4. noise level-little to no difference So what else can I try? The only thing I found that was viable was turning on sample lock so I dont need super high pixel samples, maybe I can add the noise back in post? Thanks in advance. Edited October 4, 2020 by ejr32123 Quote Link to comment Share on other sites More sharing options...
TobyGaines Posted October 13, 2020 Share Posted October 13, 2020 Very common problem, we tested thouroughly on this forum maybe 2yrs ago, sorry I couldn't find it - The result was that it's impossible to get rid of the noise as long as the bdrf in the shading core is set to GGX. Switching that to phong takes care of it ( but ofc you may end up with one of phong's ancient artifacts, in extreme cases ). SideFX really needs to fix that. 1 Quote Link to comment Share on other sites More sharing options...
TobyGaines Posted October 13, 2020 Share Posted October 13, 2020 Found it ; Quote Link to comment Share on other sites More sharing options...
evanrudefx Posted October 13, 2020 Author Share Posted October 13, 2020 14 hours ago, TobyGaines said: Found it ; Thanks, for some reason searching these forums can be difficult : ) Quote Link to comment Share on other sites More sharing options...
TobyGaines Posted October 15, 2020 Share Posted October 15, 2020 No problem - let us know if that took care of it for you, it might help others! #noise #noisy #reflection #GGX Quote Link to comment Share on other sites More sharing options...
evanrudefx Posted October 16, 2020 Author Share Posted October 16, 2020 For sure, I was able to get away with turning on the sample lock for my render. 1 Quote Link to comment Share on other sites More sharing options...
TobyGaines Posted October 16, 2020 Share Posted October 16, 2020 .... I was not expecting that, lol Quote Link to comment Share on other sites More sharing options...
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