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[HDRP] Visual Environment Background clouds setting doesn't change when changing via script
How to reproduce:
1. Open the user's attached "BrokenCloudTypeOverride" project
2. Enter the Play Mode in the "OutdoorsScene" Scene
3. Press the "2" key button on the keyboard to change the Visual Environment Background clouds to "Cloud Layer"
Expected result: Background clouds type changes to "Cloud Layer" and clouds become visible in the Scene
Actual result: Background cloud type changes, but visually nothing does
Reproducible with: 12.1.6 (2021.3.1f1), 13.1.8 (2022.1.0f1), 14.0.2 (2022.2.0a11)
Couldn't test with: 7.7.1 (2019.4.38f1), 10.8.1 (2020.3.33f1) (the project isn't compatible)
Note: When the Background clouds type is changed in the Inspector, the problem doesn't occur. However, if the type was changed via script, then the issue will reproduce even changing via Inspector afterward
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The volume system in script doesn't work that way. You have to edit the parameter instead of creating a new instance.
Try changing the code in ChangeCloudType.cs to:
visualEnv.cloudType.value = 0;
visualEnv.cloudType.value = (int)CloudType.CloudLayer;
You can find documentation on how to edit volumes at runtime here https://docs.unity3d.com/Packagesfirstname.lastname@example.org/manual/Volumes-API.html