Hi
This is what happen when i have a semi-transparency material in latest beta.
If transparency value is under 95% the material become emissive and nothing I can do to modify this.
That’s weird: when I change the transparency of a new material to (eg) 98% opaque it puts my roughness to 0%
Thanks for the report. Semi-transparent materials are lit too bright in the last preview, that’s correct. This has already been fixed for the next preview and therefore of course for the release version.