Weird color banding issues when building project (fine in editor view)

Unity Engine
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Hello all,

this problem is really driving me crazy because I’m on a tight deadline… I’m working on an HDRP project, and so far I’ve been previewing it only in Play mode. Now I built a standalone .exe from my project and am confronted with these terrible color banding artifacts:

this is a screenshot of part of the game in play mode. The camera is looking through a transparent rough surface (though this also occurs when not looking through a transparent object.)

1158×834 48.6 KB

And this is the build of the game (banding is way more noticable in dark scenes)
1874×1262 94.1 KB

(ignore the resolution dropdown, it’s not accurate)

Can anyone point me to a possible solution or at least a place in the settings to look for this? I have tried setting the Color Buffers to R16G16B16A16, but that doesn’t seem to affect the problem. I’ve also deleted all Quality Presets except for one, same thing happening.

Thanks in advance!

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3840×2160 218 KB

One more example, it’s really noticeable in dark areas. I have a custom pass that’s drawing my UI over the rendered image, but even after disabling that, the issue persists. The puzzling thing to me is that the artifacts happen in the standalone build but not in play mode.
…Anyone?