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Flicker Volume Artifacts in EEVEE on RTX Cards by increasing samples
Confirmed, NormalPublicBUG

Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2060 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.92
It seems to be only on RTX Cards

Blender Version
Broken: version: 2.83 (sub 13), branch: master, commit date: 2020-04-15 21:34, hash: rBf0221ff6674f

Short description of error
Wierd colorful artifacts every frame in volume in rendered footage from EEVEE (Not in viewport)
Bloom makes out of this artifacts a big glowing colorfull mess.
Without bloom you can see little white artifacts flying around in Volume (like in old Films) (I don't know where they come from)
if you have less Objects in your Scene. less Artifacts are their (Video 2).
And i found out that when you increase the sample rate more artifacts show up.

Exact steps for others to reproduce the error
it is in every big volume scene (this isnt the only scene where these artifacts are. All of my scenes ,that have volume in it, have theese artifacts (with bloom on, you can realy see the lightflashes)

Blend file:

Video much Stones (100 samples) :

Video less Stones (100 samples) :

Video less Stones (1000 samples) :

I hope you can find the Problem
Thank you for your Time to make Blender better.
Thank you very much

Event Timeline

Alaska (Alaska) added a subscriber: Alaska (Alaska).
This comment was removed by Alaska (Alaska).
Alaska (Alaska) changed the task status from Needs Triage to Confirmed.May 31 2020, 12:32 AM
YAFU (YAFU) added a subscriber: YAFU (YAFU).EditedMay 31 2020, 6:13 PM

Hi. I don't have the best hardware here for testing. But you may need to use Clamp values (Under Bloom and Volumetrics > Volumetric Lighting). Could you do tests with values = 10 on both and see if the problem is attenuated?

Edit:
I have tested here with the first 10 frames with default blend file shared above, and I can't reproduce the problem at least in those first 10 frames. Linux, GTX 960 4GB (440.82 driver), Blender 2.83 e5ace51295b9. Since the problem doesn't seem to happen on my system with default blend file, now I'm not sure if this is just a configuration problem.

with set the Clamp Values on 10 changes nothing (maybe the dots are not so big and not so acressive ore it is random i don't know) .
yet you can see the Domain as an xray:

But thanks aniway @YAFU (YAFU)

YAFU (YAFU) added a comment.EditedJun 1 2020, 1:01 AM

@Alaska (Alaska) . You said in another entry that you use POP! _OS 20.04 (Ubuntu 20.04 based distribution).

Do you have drivers installed from repositories? Are you sure that the driver version is really 440.82? I am asking that because Ubuntu package maintainers renamed packages to 440.82 so that it has more priority against nvidia from PPA packages, but it is really 440.64 driver:
https://packages.ubuntu.com/focal/nvidia-driver-440

@Florian Kamenz (HEYPictures) , Could you try installing the latest nvidia drivers available for Windows in nvidia official site? Edit: Mmm, apparently you have the latest Studio drivers installed. But I don't know if Game drivers would be better for Eevee.

Just trying to figure out why I can't reproduce the problem.

@Alaska (Alaska) . You said in another entry that you use POP! _OS 20.04 (Ubuntu 20.04 based distribution).

Do you have drivers installed from repositories? Are you sure that the driver version is really 440.82? I am asking that because Ubuntu package maintainers renamed packages to 440.82 so that it has more priority against nvidia from PPA packages, but it is really 440.64 driver:
https://packages.ubuntu.com/focal/nvidia-driver-440

@Florian Kamenz (HEYPictures) , Could you try installing the latest nvidia drivers available for Windows in nvidia official site?

Just trying to figure out why I can't reproduce the problem.

Yeah, it's Ubuntu 20.04 based and yeah, I probably do have the issue of incorrect drivers. Will retest with Windows now.

Alaska (Alaska) added a comment.EditedJun 1 2020, 1:56 AM

Edit: Posted the wrong build information.

No issues when rendering with:
Windows-10-10.0.18362-SP0
GTX 1050Ti 445.87
Blender 2.90.0 Alpha, branch: master, commit date: 2020-05-29 18:08, hash: rB2ee94c954d67

I asked a friend with a RTX 2070 Super to test and they experience the artifacts. May be a RTX card issue.

@YAFU (YAFU) I actually already have the studio drivers from the NVIDIA website.

I don't know much about Driver. But i have they from the NVIDIA Website.
Are they ok?

Yes, you have the latest Studio drivers. Let's just wait until some developer has time to take a look at this problem and decide what is going on here.

Florian Kamenz (HEYPictures) renamed this task from Flicker Volume Artifacts in EEVEE to Flicker Volume Artifacts in EEVEE on RTX Cards.Jun 4 2020, 11:37 AM
Florian Kamenz (HEYPictures) updated the task description. (Show Details)
Florian Kamenz (HEYPictures) renamed this task from Flicker Volume Artifacts in EEVEE on RTX Cards to Flicker Volume Artifacts in EEVEE on RTX Cards by increasing samples.Jun 4 2020, 6:27 PM
Florian Kamenz (HEYPictures) updated the task description. (Show Details)

I found some thinks out:
So if you take the numbers of Objects in the Scene higher, the Artefacts are more and more acressive
And if you take the Sample rate also higher The Artefacts are also more.

Clément Foucault (fclem) changed the subtype of this task from "Report" to "Bug".Jul 1 2020, 12:55 AM
Clément Foucault (fclem) moved this task from Backlog to Bugs on the EEVEE & Viewport board.

Seems to be a Nvidia driver bug caused by the volume integration shader.

what should i do?

Seems like the only option is to wait. Things point to the issue coming from the Nvidia driver which means either you will have to wait until a work around is developed in Blender or a fix is made by Nvidia. I'm not a developer, so I can't tell you which one will occur first, or even if the Blender development tell will try and tackle the issue.