Best settings to remove noise ?

hansmolleman33

Hi

 

I am new to DAZ3d and I was wondering why my renders are so noisy even though my scene has lightning clear as day.

My render setting are as follow: Noise filter enable, render quality: 3, Rendering converged ratio: 98%

Most of the time if I let the render finish, my end result is more noisy than if I stopped the rendering half way done.

 

Any tips to get rid of noise ?

 

Thanks

Richard Haseltine

How are you determining that the sceen is well lit - from the render or from preview? Complex surfaces can remain noisy for a long time, even with good lighting, but those are usually the exception. Are you sure this is noise (if it's just skin, and you are rendering with Draw Dome off, it could be transparency due to a bug in how Iray handles Chromatic SSS - the fix there is to use the public beta, or turn Draw Dome on, or select the skin surfaces and set the SSS Mode to mono in the Surfaces pane).

L'Adair

@hansmolleman33, It really sounds like you are dealing with the transparency bug Richard detailed. I'll bet if you save that render as a PNG image, to preserve the transparency, you will see other colors through that noise if you layer it over a color layer. I've never seen a render get "noisier" the longer it rendered except with this issue.

Ignoring the "noise" for a moment, is your render otherwise a light as you expect? If not, there is a feature in Daz Studio that may be tripping you up. (I know it did me, when I was a newbie.)

If you add a light via the Create top menu, the Daz Studio viewport will darken, and show you how that light is being distributed. It's a bit hard to compose a scene like that, so there's a setting to remove that influence from the viewport: "Ctrl+L". (It's also available from one of several menus, but the keyboard shortcut is easy to remember.) Anyway, if that is active, your scene will look as though it's well lit, even if it isn't. You can double-check the lighting in the scene by using Ctrl+L a couple of times.

However, that trick won't work if your scene is lit with emissive objects in the scene, (also called Mesh Lights, or Ghost Lights if the Cutout Opacity is set to "almost zero.") The program doesn't recognize mesh lights in the same way, so the scene will always appear lit in the viewport.

As for your render settings, I recommend you stop using the Quality/Convergence settings altogether. It's personal preference, but since I turned Quality Enable to Off several years ago, how long the image renders is up to me. Here are the settings I recommend:

• Quality Enable: Off
  • This greys out the Quality and Convergence Ratio settings, as they are no longer used.
• Max Time: 0
  • This effectively turns off the timer and your render will never time-out.
• Max Samples: (Variable)
  • With the other two settings as recommended above, this is the only setting that will cause your render to end.
  • When doing a test render, set this to something small, like 100 to 500.
  • When doing a final render, set this to something high, like 1000 to whatever. (My default is 15000, but I have an Nvidia card.)
  • You can change the Max Samples while the image is rendering. Click on the very small arrow in the middle of the left side of the render window and a menu will open. Select Progressive Rendering in the left column and then change Max Samples.
    • This is true regardless of your settings, however, you cannot change the Quality settings from here.
  • After the image has finished rendering, you can still change the Max Samples, via the render window or the Progressive Rendering settings in the main program. Now in the render window, click on the Resume button.

I hope this helps.

Paradigm

grab the 4.11 beta and turn on the post denoiser!

L'Adair

Paradigm said:

grab the 4.11 beta and turn on the post denoiser!

@Paradigm, He could install the 4.11 beta and then the Chromatic SSS wouldn't cause the transparent pixels. No denoiser needed. And that was one of the fixes Richard mentioned. I'm sure hansmolleman33 will download and install the beta when he is comfortable with it. Took me about six months to reach that point.

Paradigm

L'Adair said:

Paradigm said:

when he is comfortable with it. Took me about six months to reach that point.

That's an interesting thought that someone could be uncomfortable with something that has literally no risk at all, but to each their own.

MoreTN

I've read that 4.11 struggles with some older file types, .daz being the one that springs to mind. If you don't have any old products, then no issue. If you do, might be worth searching your library and re-saving any .daz you find as .duf before going to 4.11

MoreTN

Also, this may be an option if you don't want to upgrade yet. https://www.daz3d.com/forums/discussion/316206/denoise-renders-and-save-a-lot-of-time-nvidia-not-reqd/p1. I haven't tried it as I am using 3Delight atm and noise doesn't seem to be an issue for me.

Ivy

You hardly ever if ever get grainy renders in 3dlight . unless the textures are grainy

I would follow L'Adair advice for iray its about the general rule for iray settings  you can also  try Under Iray filter setting choosing Mitchell over Gaussian, that has been usually the best filter to use for clear dark renders specially if your using hdr for your light source. that has been my experience.
 

 

hansolocambo

EDIT 2020/04/04

Denoiser helps a LOT to decrease render times and you can get an outstanding result in a fraction of time it would take to render without.

If you want a very pixel precise, crispy result, DO NOT activate the post-denoiser. It's equivalent to a photoshop Denoise filter and you really don't want to do that (if you ever need to) from the render window. 

The AI Denoise from NVidia does an outstanding job at getting rid of the white pixels. And the result I get are crispier and way more precise with Iray + Denoise than Iray alone. 

This is the way I configure my Iray for renders, and the results are definitely excellent / fast / not blurred at all.

 

You will see that the Denoise does a truly outstanding job without blurring anything. With those values the Denoise acts as a ":Dust and Sparkles" filter, with higher values (Degrain Radius and Blur mostly), you'll get on top an effect similar to the Photoshop Denoise, which I don't like as it's easy to blur things out if not used properly.

function

Thank you @hansolocambo, I tried to search Render setting skills but didn't find too much for the 4.12 Iray render, yours includes a detailed photo which is very welcome.

I have two questions:

1. the last in your photo, the pixel filter redius, but I saw someone says the defult 1.5 is better than 0.8, so what the function for this parameter? See this https://www.daz3d.com/forums/discussion/356736/solved-diff-render-settings-for-ds-4-12

2. how about other pans setting such like Alpha, Optimization, and Spectral Rendering, for a 1080ti desktop?

Best regards,