So I’m having this problem where using a different HDRI in the reflections override slot to the scene environment lighting slot is producing a lot of fireflies that denoising can’t take care of.
The attached image is 75 passes on this region took 1:48, denoised at .6 took an additional 3:40, and really didn’t make a difference, so I’m tempted to assume these over-bright pixels are messing with the denoise calculation too.
Highlight clamping was to 10 just to see if that helped, it didn’t have much impact.
Both hdri’s are .hdr, using the reflections override HDRI in the scene environment instead don’t produce the fireflies, and using a .jpg of the HDRI in the reflection slot doesn’t produce the fireflies either. This happens with a reflective override material as well, the grey metal has no reflection/gloss/bump maps that would cause speckling.
ugh, nevermind, it was the geometry, my coworker had it auto-smoothed… as soon as I cleared the smoothing groups it looks fine. Well, at least that’s solved.
Hmm… I wasn’t able to reproduce this. Can you help? A scene with the specific HDRIs used would be great (if you can’t share them publicly, you can contact us via https://coronarenderer.freshdesk.com/support/tickets/new). I am not really getting any fireflies with 1.4.1 or 1.5.
