Grainy iRay Renders
Mr_ E
Posts: 68
Can someone give me advice on how to de-grain renders? Thanks in advance.
Grainy Bus.JPG
1386 x 801 - 208K
Filtering Render Settings.JPG
436 x 795 - 54K
Daz 3D is part of 
Connect
DAZ Productions, Inc.
7533 S Center View Ct #4664
West Jordan, UT 84084
Licensing Agreement | Terms of Service | Privacy Policy | EULA
© 2025 Daz Productions Inc. All Rights Reserved.
Comments
Nice scene, looks like it needs to cook longer though.
What are your Iray render settings?
Where would I find them? I've included a shot of my Filtering tab.
When you click on the render settings tab to start your render, then the Progressive render section
*edit*
you will either want to increase the max samples or the render time, or both.
There are other things you can do to help render times, like adding more light and turning down the ISO to get the same look.
I dont understand why people use the Render Quality option, each to his own but i unable that and play with the Max Samples. Your pc will love it. Start of with 1000Max Samples and up the res rather. Then play with the Max Samples up and down until you are happy with render quality and speed.
For OP lighting is your best ally wrt grainyness. The more the better.
As koatkbliss said that is a very nice looking scene.
Perhaps with the implementation of iRay an important warning (hint) was missing.
Hi plarff,
yes, you ca do so.
But:
It depends on the scene setup. Sometimes a limit of 1000 iterations is sufficient, sometimes the convergement has to reach at least 99.9% with Render Quality >= 4. And somtimes both conditions have to be fullfilled.
I prefer to wish: "Ignore all limits. It is only up to me to decide when the render is done."
But it is ever funny to see how iRay tries to tell me a certain quality status.
@ Mr. E:
Nice picture. Looks realistic and as if taken with an old analog camera at very high ASA.
is a nice picture
Where would I find them? I've included a shot of my Filtering tab.
I am not sure how much this will help but besides just clicking the "On" for 'Noise Filter Enable' I always change the 'Noise Degrain Filtering' from 0 to 1. I also use the "Architectural Sampler", located on the 'Optimization' tab, to 'On' for any interior setting.
I then put my max samples to 15,000 and my Max Time (secs) to 21,600 and check it periodically until I think it looks good.
If I see that it is not going to eliminate the grain I will then use canvases and overlight my scene to make it easy to render and faster and then take my individual .exr files into PS to do post work and adjust each light group.
Use these links for canvas info if you are not familiar:
The second part gets into the editing portion, though he doesn't use PS it is pretty much the same process.
I know that it is nice to get everything out of the render without doing post work but I have found that some scenes that I want to do really are difficult without letting it run for a long time so I have found myself using canvases more often now. They also have the added benefit of making a scene versatile where you can go back anytime to edit the lighting easily.
Hope something from this helps you.
Where would I find them? I've included a shot of my Filtering tab.
My rendering settings are the same as the one you've pictured, kaotkbliss. T
Thank you so much.