OTOY Forums

Hi,

I'm trying to render subsurface materials (animation sequence) but no matter how high I set the settings, I still get flickers and movements on the SSS materials. It's like something is moving inside them. Here are the screenshots of the material and my octane setting.

Any help is appreciated.

Thanks!

Hi,
difficult to see the flickering from screenshots, do you mind to share a video?
Which version of plugin are you using exactly?
Do you have AI Denoiser active?

ciao,
Beppe

Hi,

Here are the answers to your questions:

1) Preview Video is here: https://www.dropbox.com/s/bsj0bszhos6j7 ... r.mp4?dl=0

2) Octane Cinema 4D Plugin Version: 2021.1-(R4)

3) Denoise is ON.

Thanks!

Hi,
maybe I'm wrong, I cannot see the video very well due to compression, but probably the flickering is caused by AI Denoiser at a low Max Samples.
SSS effect needs more samples, so you need to increase the Max Samples in Kernel panel, to have a less noisy frame before performing AI Denoiser

ciao,
Beppe

Noted. What is your suggested max samples for this? I did increase to 2000 samples and made a test. There was less flicker but still visible.

Would you like to take a look at the project file?

How long does 1 frame take?
I would:

- Increase Path term power
- Increase Parallel samples
- Lower diffuse + specular depth samples as much as possible
- Increase caustic blur (probably the specular material will be bit brighter)
- Turn on AI Light
- Turn on adaptive sampling

And see if that speeds up things a bit.

You should also enable "Static Noise". It will help reduce flickering when denoising animation

Thank you so much for the tip. Turning on "Static Noise" & "Ai Light" effectively removed a lot of noises and movements within the SSS. It is still a tiny bit but much harder to spot hopefully.

The other earlier suggestions did not work at all. Even setting samples at 2200 (Takes 5 minutes per frame with a RTX3090), did so little to reduce the noise in Sub Surface Scattering materials.