How to denoise SSS, light and refraction passes?

Maxon Cinema 4D (Export script developed by abstrax, Integrated Plugin developed by aoktar)

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prodigiosovolcan
Licensed Customer
Posts: 27
Joined: Fri Feb 22, 2019 2:14 pm

I need to render a sequence in passes. AI denoiser gets its work done in beauty and denoised passes (as diffuse or reflection) but I can't manage any workaround to clean SSS, light passes and refraction. Ideas?

Thank you
elsksa
Licensed Customer
Posts: 784
Joined: Sat Jul 24, 2021 1:06 am

Hi,
Without scene-specific information, one could only share pointers.

Prior to denoising, scene / rendering optimization is inevitable. What this path explored, yet?
This dedicated page will help.
prodigiosovolcan
Licensed Customer
Posts: 27
Joined: Fri Feb 22, 2019 2:14 pm

Hey elksa, thanks for you answer and your site, I will definitely check it out, looks awesome!

Let me share some info about the scene. Theres a lighthouse with a spot light in it (volumetric gets very noisy, I tried without the glass material so the light doesnt need to go through it, but still very noisy). I even noticed better results with sampling rate at 1 instead of 1024 for example. Also water gets noisy because of the SSS.

I'm trying to optimize octane settings as much as possible, otherwise those 500 frames would take ages to render. That's why I rely on denoise that much for those two things.


Please don't hesitate to ask me any further info you may need. Thanks again :)
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elsksa
Licensed Customer
Posts: 784
Joined: Sat Jul 24, 2021 1:06 am

Thank you for the information and screenshot!

Briefly:
• Spectron Light aka the volume-spotlight, would fit well in such case (if not already)
• Light Sampling Rate Light samples. This is covered in the aforementioned link.
• The render settings I see are relatively well set, but can be tweaked further. This is covered in the aforementioned link.
• It would be ideal to avoid having the volumetric-spotlight going through a glass material. There are various ways to do so.
• Parallel Samples can be pushed to the maximum when there is enough VRAM.
• The two last checkboxes should usually be left unchecked. More on the first checkbox here.

Let me know if any point of the non-exhaustive list need to be elaborated.
Most of these information are on the pages I wrote. Do not hesitate to check all the ones that relate to the scene. This link features all of them.
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