Seeing huge lighting differences to our game once updated to 2020.2.7

See images,

I'm seeing overall scene brightness changing pretty drastically across all scenes for our game post updating from

Unity 2019.4.18 (expected lighting)

to

Unity 2020.2.7 (scene is brighter)

What changed? Any ideas?

 

DId a test and I'm seeing a drastic difference in RGB values between the two versions. Here are our results.

 

There was a fix about incorrect sampling of SPH in gamma workflow.
https://github.com/Unity-Technologi...iversal/ShaderLibrary/Lighting.hlsl#L575#L579

So if your project uses gamma workflow, the ambient color of non-static objects may changed to the correct color(that matches to ambient color of static objects with lightmaps) in the new urp shader..

 

No offence but, stop updating Unity! Once you start a project, you should never update, stick with that version, or you will keep encountering probs like this.

 

That is why you do the lighting as a last thing in unity.
This way you can update only moderately painful.