Hi everyone,
I recently enabled the Substrate framework in my Unreal Engine 5 project to test its features. However, after deciding to revert back to the Legacy Material System (disabling “Substrate Materials” in Project Settings and restarting), I’ve encountered a critical issue with my materials.
The Issue: The Roughness input no longer seems to affect Non-Metal (Dielectric) materials. Regardless of the value or texture plugged into the Roughness slot, the surfaces appear either fully glossy or have a broken specular response.
This issue persists even after: Deleting the DerivedDataCache folder.
Has anyone else experienced this “broken” roughness state after disabling Substrate? Is there a specific console command or a hidden setting that needs to be reset to restore the standard PBR roughness behavior for non-metals?
Any help or insight would be greatly appreciated!
