If you are using RT translucency, all the parts you see “behind” a glass, will use Lumen scene lighting. You see what it looks like by using the view mode Lit > Lumen > Overview, and see what could be expected. You can improve the lighting by using “Hit Lighting mode in Lumen”.
/Charles.
Thanks found the problem.
Thanks for reporting! I have filed a bug on us. But I would need more information:
It started happening after enabling Substrate in the project.
For carbon fibre its this:
For regular car paint its the SImple Clear Coat node.
Unreal Engine 5.6.1
Is it known that Global Illumination for CPU Lightmass is not working with Substrate enabled in UE 5.7.1? No matter wether Adaptive or Blendable GBuffer. In UE 5.6.1 it is as well not working.
Is GPU Lightmass working for you?
Unfortunately GPU Lightmass doesn’t work for me.
I can test at home, someone send me a codesnippet to visualize the GI in materials somehow but only to test wether they are baked but not correctly rendered with substrate.
CPU lightmass baking was working at some point that is sure. I have not checked 5.7 but it is broken in 5.8 indeed you are correct. Adding it to the list. Thanks for reporting.
