Hey,
we are currently upgrading from 5.5 to 5.7 and notice differences for clear coat materials.
To be specific it is about the clear coat roughness and the reflection generated by a soft source radius in lights.
We need a way to maintain the current look of our materials when upgrading. Is there a way to tweak a CVar or parameter in a master material to achieve the same results?
The visual difference in the engine clear coat material is less than what we see with our materials, since we adjust the roughness.
We don’t use substrate and in the reproducer I set the rendering settings as they are in our project.
Thanks,
Dominikus
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Steps to Reproduce
I created a reproducer for 5.5 and 5.7 with the same setup and rendering settings.
For the reproducer I used the engine clear coat material.
You can see the difference when you pilot the camera for each reproducer and compare the viewports.
You can also toggle to the sphere or other geometries if that helps.
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Hello,
Thank you for reaching out.
I’ve been assigned this issue, and we will be looking into this lighting difference for you.
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Hello,
Thank you for reporting this. I can confirm this visual difference can be reproduced as described in the latest CL, and have opened a bug report:
The tracker will be visible after it is approved internally at Epic Games and is publicly accessible.
If you wish to look into a workaround, a good place to start would be to examine the changes in CLs 44309008 and 44388930 on //UE5/Main. These CLs move the lighting system over to the Substrate lighting path.
If you have any further questions, please let us know.
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