strange phenomenon

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lehieu
Posts: 3
Joined: Sat Oct 20, 2018 6:15 pm

could you explain me how to remove the colorful noises in the photo attached?
it happens when i add a spotlight to get bloom/glare effect.
i rendered maxsample up to 5000 but it didn't go away
Last edited by lehieu on Tue Aug 17, 2021 5:06 am, edited 1 time in total.
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bepeg4d
Octane Guru
Posts: 10393
Joined: Wed Jun 02, 2010 6:02 am
Location: Italy
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Hi,
probably you have overexposed pixels, try to increase the Saturated to white parameter, in the Camera Imager node.

ciao Beppe
lehieu
Posts: 3
Joined: Sat Oct 20, 2018 6:15 pm

bepeg4d wrote:Hi,
probably you have overexposed pixels, try to increase the Saturated to white parameter, in the Camera Imager node.

ciao Beppe
it cleans out big noises but small noises can't be removed
Last edited by lehieu on Tue Aug 17, 2021 5:07 am, edited 1 time in total.
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bepeg4d
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Joined: Wed Jun 02, 2010 6:02 am
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The noise depends from you lighting, materials, and kernel settings, so difficult to say from the render.
Also camera Imager settings can have an impact on noise.
Are you using Path Tracing or PMC kernel?
Please post some screenshots about light, diamond material, camera imager, and kernel settings.

ciao Beppe
lehieu
Posts: 3
Joined: Sat Oct 20, 2018 6:15 pm

bepeg4d wrote:The noise depends from you lighting, materials, and kernel settings, so difficult to say from the render.
Also camera Imager settings can have an impact on noise.
Are you using Path Tracing or PMC kernel?
Please post some screenshots about light, diamond material, camera imager, and kernel settings.

ciao Beppe
this is my project, please check it for me, thank you very much
https://drive.google.com/file/d/1qaT1pa ... sp=sharing
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bepeg4d
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Posts: 10393
Joined: Wed Jun 02, 2010 6:02 am
Location: Italy
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Hi,
I have a missing plugin error:
323E6B88-2BBA-4F9D-9CA7-EDFD69C8C992.jpeg
Anyway please try with the following version:
colorful noise_b.zip
(2.36 MiB) Downloaded 296 times
I have cjanged the Light ID of one light, and enabled the Transparent Emission option for both lights:
239F7E7E-3FD7-4B70-8FDB-3E0E305C4474.jpeg
Then reduced the GI Clamp to 10, copy pasted the Exposure from the Camera Imager to the kernel panel in the Expected Exposure field, and enabled the multi light passes, so you can evaluate each light and environment separately.
2B7B537C-095A-4268-9116-E089886C8683.jpeg
I don't see colored noise, but only dispersion, anyway, I have enabled the AI Denoiser for the final touch.

Looking forward for your feedback,
ciao Beppe
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