How to avoid skin fireflies on Genesis8?
szepdavid
Posts: 22
Hi!
This was not a problem a few years ago. I remember when i used Genesis 3 characters with Daz 4.8. My renders was clean, fast and noise free. But these new Genesis 8 characters are pain in the ass when im rendering. They have complex skin shader. and tons of textures...
My question is simple, how i can avoid these green-red fireflies on every Gen8 character skin? I know fireflies appear when not enought light in the surface, or the surface very reflective. But this isn't that case. It has enought light. I mostly use HDRI images az my main light. Should i always use the spectral rendering option with Genesis 8 characters? They often looks too orange red color without it. Thanks for the help.
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Comments
The render you have attached obviously hasn't rendered long enough, as the hair also has fireflies.
Personally I haven't noticed any changes, it's possible that older characters may have skins that render faster but I just render until the render is clean which may take 2 or 50 or whatever minutes, depending on the content. And I've never used Spectral rendering.
Yeah, that one needs to cook a bit longer it looks like. Another thing you can try is the post-denoiser, which is available in the newer versions of Studio. You'll find it under render settings>filtering. You have to first click to make it available there, and then turn it on. It is very nice, default it kicks in at 100 iterations, but I set mine to 1000.
If that is a 100% render it helps to increase the Quality parameter.
I once had a scene that rendered 100% with standard Quality (=1) and still looked atrocious. I got good results when rendering the scene with Quality=3, plus a few spot renders with Quality=5.
My renders take about 2 hr before I deem them satisfactory and that's with the setup down there.
That on its own isn't particularly informative without also knowing things like scene complexity and render resolution.
When it comes to Daz main characters, I usually knock the translucency parameter on the skin down by about .1 to .3 (.75 is a common final value, although I have occasionally used .60), which tends to make their skin less orange, as well as slightly reducing the time for the render to reasonably converge.
Non-DO main characters tend to have a lower value anyway, but it is useful to have a rough understanding of the effects of translucency when dealing with newer characters.
I upload another picture, the previus image is not a daz original character, but you can see this time the difference. A lot more noise on g8 character.
That colored noise usually means the figure has chromatic set under the SSS settings. Chromatic takes longer to clear up but when it does it IMO looks better than mono.
Don't avoid fireflies just remove them with Mcasual's script for removing fireflies. https://www.daz3d.com/forums/discussion/334881/use-this-a-i-based-open-source-de-noiser-from-the-comfort-of-daz-studio#latest
Render for 4mins and use MSI Afterburner to turn your nvidia fan to 100% so you don't cook your card!! Then use script to remove fireflies.
What helps with me is a combo of;
Max time to zero (means it renders how long it will.)
Max pan length to 50
Post Denoiser (all options checked) to 222.
I upload another picture, the previus image is not a daz original character, but you can see this time the difference. A lot more noise on g8 character.
This works great! Thank you!
This isn't very good advice. There is nothing magic about 4 minutes and render quality involves much more than noise. The biggest common issue with question like this thread is inadequate lighting.
Further, while ther is othing wrong with Afterburner, the standard Nvidia fan profile will ramp up the fans and throttle the card if temperatures reach the operating limit.