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Noisy reflection from texture emmision
Posted: Wed Nov 17, 2021 9:55 am
by atoyuser1
Hi, I've found a few post on this subject, but not a straight forward solution.
I have this render at 1000 samples, but the reflection is still noisy:

- 1000 samples
Aside from adaptive sampling etc, is there something I'm missing? I tried upping the sampling rate on the emission texture, but that doesn't seem to help:

- emission texture settings
Re: Noisy reflection from texture emmision
Posted: Wed Nov 17, 2021 1:46 pm
by elsksa
Hi there, proper sampling is
primarily what should be correctly set, according to the scene. Light Sample Rate ≠ Light Samples.
This page does cover most of the important settings and could help:
https://www.elsksa.me/scientia/cgi-offl ... r-settings
Re: Noisy reflection from texture emmision
Posted: Mon Nov 22, 2021 9:33 am
by atoyuser1
thanks for the link, I had a read through it but couldn't see anything directly linked to my problem, but I will have another look
Re: Noisy reflection from texture emmision
Posted: Wed Nov 24, 2021 5:11 pm
by whersmy
If you are on c4d and are able to export an .orbx, i can take a look at the kernel and settings

Re: Noisy reflection from texture emmision
Posted: Wed Nov 24, 2021 5:49 pm
by atoyuser1
I cannot export orbx, but here's the C4D file. It's R24
Re: Noisy reflection from texture emmision
Posted: Wed Nov 24, 2021 6:41 pm
by whersmy
I thought it was possible to export to .orbx with c4d.
https://www.youtube.com/watch?v=zzlPI68RRW0 here it`s explained!
Re: Noisy reflection from texture emmision
Posted: Thu Nov 25, 2021 10:37 am
by atoyuser1
Ok I simplified it as much as possible, thanks!

- render
Re: Noisy reflection from texture emmision
Posted: Thu Nov 25, 2021 4:20 pm
by elsksa
Hello atoyuser1,
atoyuser1 wrote:
thanks for the link, I had a read through it but couldn't see anything directly linked to my problem, but I will have another look
The information you are after is available in both my "article" and the official OTOY Octane documentation.
I have made some simple changes to the scene. Feel free to look into it, I have attached an ORBX file.
• I have made some subtle changes to the PT Kernel,
• I have changed the light's color node to GaussianSpectrum, being recommended in some cases (more information in the official documentation).
• For the sake of this test, I am using Filmic OCIO since having a display rendering transform is mandatory (
https://www.elsksa.me/scientia/cgi-offl ... rvival-kit). It might render black. It can be set back to default, in the Camera Imager, or the Filmic OCIO can be loaded in the Octane's preferences, to match my scene 1:1.
• I am getting an acceptable result at 512 samples instead of 1000 and without a hardcore GI Clamping of 1. The Camera Imager's "Hot Pixel Removal" can be used at a "fair" value (ranging from .4 to .6 for instance).
I have limited myself to the original provided scene file. If that was me, I would have approached the scene differently (in regard to lighting, shading and "color management").
Re: Noisy reflection from texture emmision
Posted: Fri Nov 26, 2021 12:51 pm
by atoyuser1
Thanks elsksa. You Obviously know your stuff. Looks like I have a lot of reading to do!