Post Denoiser causing weird colour cast in renders?
Aethyr
Posts: 100
Hi there,
I set up a render last night, and as usual I enabled the post denoiser (render settings > filtering). However when I looked at the finished result, it had a severe turquoise colour cast to it, which was not desired. I thought this may have been something in the tone mapping, but that had no effect; it also doesn't show up immediately in Iray Preview (because I'd set the denoiser to start at 250 iterations) so I didn't spot it at first.
Obviously this is an unintended and undesirable effect; however I've not observed it in any previous renders where I've had it enabled, so either it's a new bug or there was some peculiarity of my scene that caused it to trigger. I'd appreciate any advice (that isn't just "turn it off"), though I appreciate if it's due to some specific quirk of this particular scene that it might be difficult to troubleshoot.
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Comments
It's a bug in the current nvidia drivers. Leave the setting off or downgrade your drivers for now.
It's the 'Alpha' setting in particular that is causing this. Denoising will work OK without it in most situations.
What's your graphics card ? This bug has been fixed in the latest driver (I'm using 536.25 ~)
I use 531.61 and the alpha denoiser seems to work fine here without side color effects.
I still get the bug!
RTX3060 with 536.40 game drivers, on windows 11 and Studio Beta 4.21.1.48
My bad! I forgot to switch on ...Alpha ~~ Yes you're right, 'turquoise' issue still persists... with both Gaming and Studio drivers.