Transparent "fireflies"?
I let a couple of Iray renders run overnight and at first glance this morning they looked good, but now I come to actually use them it turns out they have a smattering of what I at first thought were fireflies, but instead turn out to be holes (I've attached a small section of one below). What gives? There are some deliberate transparent areas in the image (it's an interior shot, and I'm comping in the view outside the window) so is it somehow "reflecting" the transparency? I can get rid of the holes easily enough, but the whole point of running them overnight was so that I could ramp up the quality settings to minimise cleanup and they've somehow come out worse than normal!
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It's a problem with the new dual lobe shader. You should follow this thread
https://www.daz3d.com/forums/discussion/176756/script-apply-dual-lobe-features-to-pre-lobe-g3-skins/
There's a fix for it :)
Cheers -- I will have to experiment further with different SSS settings and lighting setups to avoid it in future, but for the purposes of getting this job done I noticed the holes don't show up until around 3500 iterations so I've "fixed" it by doing a second render at 1000 then placing it behind the full fat render in Photoshop; not perfect, but much better than the holes!
Cheers -- I will have to experiment further with different SSS settings and lighting setups to avoid it in future, but for the purposes of getting this job done I noticed the holes don't show up until around 3500 iterations so I've "fixed" it by doing a second render at 1000 then placing it behind the full fat render in Photoshop; not perfect, but much better than the holes!