Speckles in my 3000 pixel renders with Iray
rnollman
Posts: 310
I noticed that the rendered version of my scene has speckles on the arm (see attached image). Is there some other way of getting rid of them by modifying rendering parameters and not by postwork in Photoshop to remove them? Would better lighting help or is this something that you have to live with IRAY renders? Are Octane renders better?
Speckles_01.JPG
798 x 707 - 128K
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Comments
That is noise from insufficeint convergence - I would imagine your render stopped as it had run out of time. How is the sceen lit, and are you sure it is using your GPU (assuming you have one that is supported)?
How would I know if it was using my GPU? If it was not, why would it not use it and what do I need to do to get the best results from my graphics processor?
As far as lighting is concerned, that could be the problem. I will render with another lighting program and see if it goes away.
Weren't there also some issues with rendering on a transparent background?
I don't recall those showing as noise.
What are you settings in the Advanced tab of Render Settings - does your GPU get listed alongside the CPU? What operating system are you using?
I think what I was remembering was transparent pixels with Chromatic SSS when Draw Dome was Off. Does that ring a bell? This was several years ago. Maybe it was fixed???
Yes, that sounds right - I thought it was fixed, though I've not tested.
That just looks like a bit of pixelated glare coming off that highly reflective clothing. Try using the Denoiser that's built into Daz, or if you're rendering on CPU you could try this : https://taosoft.dk/software/freeware/dnden/
It's a Graphical User Interface for both the NVIDIA and Intel denoisers. It was built by Daz forum user Taoz
You can render at 4000 or 5000 thousand pixels and then scale the render down to 3000 pixels which will most times eliminate all the noise pixels. If not, then apply a Guassian Blue filter of radius 1.5 pixels to the scaled down render.
nonesuch00 If you're going to try and eliminate blank pixels or fireflies with Gausian Blur in an image editor it's probably better to do it before scaling down your render. That way the scaling will reduce or eliminate the blur you introduce. It's really much better to use an NVIDIA or Intel denoiser like I linked to, since both of those use AI and will only effect the noise in the image and not blur or otherwise change the parts that don't have noise.