Question Inconsistent bounce light with ShaderGraph and Auto Lightmap UV

Hello,

We have an issue with the intensity of the bounce light when using a shader graph material on a mesh with auto generated lightmap UV. The bounced light from the material with the shadergraph appears darker compared to using URP/Lit.



In the image above, I have created walls from blocks with alternating URP/Lit and ShaderGraph materials. The bottom most wall shows the issue where the bounced light is inconsistent. The wall just above is correct, it has the same alternating materials but uses custom lightmap UV instead.

That is the weird part, the bad behavior seems to happen only with the combination of AutoUV and ShaderGraph.

I have attached a package that shows the issue.

It really affects the lighting in some areas where most of the light comes from bounced light.

Anybody else saw this? Is this a known issue?
Thanks

 

I did file a bug, case 1253185.
It was closed as a duplicate of https://issuetracker.unity3d.com/is...terial-only-works-for-primitive-unity-objects

From the description, I am not 100% sure it is the same issue, but it does share some similarities.