We are currently facing a problem with a bunch of our materials. The glossiness in the current engine version gets calculated differently than in previous versions.
I’m unsure if this is the correct behaviour or some kind of faulty calculation.
Here is what it looked like a few releases ago:
And this is how it looks now:
The Lighting setup is the exact same for both as well as the material.
The problem seems to be the combination of skybox and the glossiness value in the material.
I can get the material to work correct either by removing the skybox and using a directional light or by reducing the glossiness value in the material.
Here is a sample project: