Blurry Wiggle with Animation

[Grant XR3D]

Hi I have experienced some awesome successes with animation, but I keep running into one issue with wiggly denoising in animation.

I uploaded 2 animated shots to youtube (one day one night). You can see the problem is worse at night than in day. I know this is a denoiser issue, but I tried not using the denoiser and even with my noise threshold set at .001 it was way to noisy to give to a client.
https://youtu.be/0dkYymTfzOM
https://youtu.be/kYmGItMcsvQ

Things I've tried:
1. Jacking my samples up to 800 (usually I am at 400)
2. All the different Denoiser settings (NVIDIA OpitX AI, Intel Open Image Denoise, Only Final Pass) The example is only final pass
3. I tried rending at 8k but my computer didn't want to.

Thanks!!

[vladimir.nedev]

Try enabling "Direct light reservoir (re)sampling".

Greetings,
Vladimir Nedev

[npg]

The option in question is in Render>Advanced. It helps when you have more than a few separate light sources (especially with hundreds to thousands).

Note that setting the noise threshold to 0.001 does not mean the whole image will have this noise level. Just like in V-Ray, this is only one of the sampling limits which helps by disabling pixels that are quickly cleaned up. But the noisier areas will usually be sampled until the AA (camera) sample limit from the render dialog is reached. Even then, the noise level could be higher than the noise threshold for some pixels.

[Grant XR3D]

2 Tests both Failed:

1. I tried multiple times to turn the Direct Light Reservoir (re)sampling on, but each time it Vantage crashed. "Direct3D ERROR . . . This is either a bug or the system ran out of resources." For reference it didn't tax my computer for a bit and then crash, the crash happened very fast.
I have attached multiple screen shots:

Debug and Dump.zip







2. I tried hiding my forest pack and then clicking the "Direct Light Reservoir (re)sampling" box. This time it turned on without a crash.
UNFORTUNATLY I am still getting the blurry wiggle (when animating) on trees that are not forest pack items.
Also, unfortunately I need the plants in the foreground as they are very important to my client.



It feels more like the problem is presenting itself in the denoising. I am wondering if I am missing some sort of iterative denoiser button? It feels like each frame is denoising on its own without referencing the frame before or after. Would the old stand alone "denoiser tool" work? I didn't try it because it didn't appear to have the proper render elements.


Thanks again for your help. I am loving Vantage and hope to get these issues sorted out.

[Grant XR3D]

I know you probably haven't made it back to work, but I have been reading forums and testing things for the last few hours and I thought I'd give you a progress report.

As suspected the denoiser tool did nothing, and I am withdrawing my suspicions about the problem being denoising.

This forum got me thinking. Vlad says something about things being lit by to many lights:
https://forums.chaos.com/forum/chaos...-noise-problem

In the video referenced above (https://youtu.be/0dkYymTfzOM) the light posts have 4 vray light planes and the trees have 2 vray light discs, reducing them to 1 light plane a piece helped a bunch.
The bushes against the building are lit by a bunch of light discs so I excluded the plants from illumination so they wouldn't have so many light sources but the building would still be lit. . . but figured out that that feature isn't supported yet (no worries, I'm not complaining) so they are still flickering.
I turned off Animated noise Pattern which seemed to help
I maxed out the light tree samples to 16 samples

These workarounds have greatly improved the shots, hope they are helpful to someone else in the future.

At this point the only thing that I am still trying to work out is the plants up against the building. I can't turn off the downlights because they are important to illuminate the building, but they are causing the plants to spaz.

Again thank you and any help trouble shooting the "Direct Light Reservoir (re)sampling" problem, or thinking a work around for lighting the building but not the plants would be greatly appreciated!

[npg]

Thanks for sending the debug files. They show that the GPU has hanged and the driver reset it. This could mean we have a bug, but probably one that is triggered only by specific data such as your scene. If you can share the scene privately we will try to get to the bottom of it. You can use this form with a link to the forum thread: https://support.chaos.com/hc/en-us/requests/new You will have to include all asset files - I see there are vrmesh files and hundreds of textures in the log.

As a possible workaround, in order to see if the reservoir resampling could work, you can modify the driver setting so that it waits longer before considering the process hanged and resetting itself. You can do this by modifying the TdrDelay registry key described here: https://learn.microsoft.com/en-us/wi...-keys#tdrdelay Set it to something like 10-15 seconds and see if Vantage survives. If this sampling option works, you can revert the light tree samples to 1 to speed up rendering.

Side note: animated noise pattern shouldn't matter. All this does is that it shuffles the noise, it doesn't affect the amount of noise. We use this option to create reproducible renders by disabling it - this way the noise should be exactly the same every time you render an image.