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Killian
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Extreme jitter on camera transform change (Unity6, HDRP)

02 Dec 2024, 17:45

Hi again.
As I said before I was about to dive into effects and stuff this week when I came across some visual glitch after I added some sort of player controller script to the camera in Unity.
Since I was using a custom shader for tinting textures and also played with Chromatic Aberration effects I first thought it might just be my code, but the perceivable effects or artifacts are exactly the same with your samples. I think it's pretty obvious in the GIF below.

Image

The sample is imported and unchanged, I just added the Custom Pass Volume to make NoesisGUI work with HDRP. I know you guys are not finished with evaluating Noesis in Unity6+HDRP, maybe this is something that only happens with HDRP, hadn't have the time to test URP yet.

Just to eliminate false expectations ... I assume the UI usually should stay pixel-perfectly in place, right? :-)
 
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Killian
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Re: Extreme jitter on camera transform change (Unity6, HDRP)

02 Dec 2024, 21:43

Oh gosh, this was kind of stupid. Well not quite but still a bit needless.
The reason for the jitter was a wrong parameter in the volume settings. The docs propose to set the Injection Point to Before Post Process or After, the latter just slipped my eyes.

Basically After Post Processing is the only option that makes sense unless you actually want your GUI to be affected by scene post processing.
Image

I'll leave the answer here in case anyone else blunders into the same.
 
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jsantos
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Re: Extreme jitter on camera transform change (Unity6, HDRP)

03 Dec 2024, 12:53

Thanks for the feedback! I will review this as soon as possible.
 
Daxten
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Re: Extreme jitter on camera transform change (Unity6, HDRP)

05 Jan 2025, 01:23

Hey,

I had the same issue and found the same solution.

But now I have the problem that with "After Post Processing" the UI is getting rendered nearly completly black, while "before post-processing" it is rendered correctly, but with that laggy effect the thread creator is also having

I'm using Unity6 + HDRP + linear color space + HDR.

Image After Post Process (no jitter)
Image Before Post Process (with jitter)
Last edited by Daxten on 05 Jan 2025, 01:54, edited 2 times in total.
 
Daxten
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Re: Extreme jitter on camera transform change (Unity6, HDRP)

05 Jan 2025, 01:50

After playing around, seems to me like HDR is creating this "dark" issue. Deactivating "Allow HDR Display Output" and "Use HDR Display Output" fixes the darkness Issue.

I guess this might be related to changes with Unity 6 and HDR / rendering?
 
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jsantos
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Re: Extreme jitter on camera transform change (Unity6, HDRP)

08 Jan 2025, 18:43

yes, this is related to latest changes in Unity 6. Unfortunately, we still didn't have time to test this properly. Could you please file a ticket? Thanks!
 
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jsantos
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Re: Extreme jitter on camera transform change (Unity6, HDRP)

15 May 2025, 02:06

More information in #3909 and #4168

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