Hello,

Strangely, on only one sequence of a project render animation, we have a lot of noise jittering : from good to bad to really bad frames.
Half rendered images are just unusable :


look one frame before and the other one just after, result are drastically different.
We don't use any denoiser here.

Here is the setttings used :


Any idea of what happen ? (H.20.5.584)
Thank you

Two things jump to mind
- what happens if you render with the variance oracle disabled?
- are you able to replicate the issue with a simplified scene? (and therefore can submit a bug)

Ok, we'll re-render without oracle for test.

About replicate on simplified scene, I'll try it but have absolutely no time to do this this week.
That's already 2 times we rendered this sequence..

Are you in a position to post the source EXR files? (1 clean, 1 broken)
Perhaps there is information in the header that could give us clues
thanks

Yes, thanks, I post them now to your support.

Just a quick note to say that with variance oracle disabled (sampling set to uniform) the problem still here.

Edit: Also I still have no response from support since I post 2 rendered images (one good and one bad) last week..