What are the Differences in Material Handling in Blender 3.3 over 3.2?

[lionheart001]

I am curious what has technically changed in Materials management in Blender 3.3 over 3.2?

For instance, when I export a project from Blender 3.2 with beautiful reflections settings working, I export the same project from Blender 3.3 and quite a few of the materials are changed and the beautiful reflections are all gone.

I am using PBR materials but for some reason, they are not exporting properly.

I cannot really put this into the “Bug” reports because this is centered around an ‘Addon Exporter’ for glTF-2 for Microsoft Flight Simulator. But odd that the colors and reflections arent handled the same. Perhaps the Nodes for Materials has changed?

[lionheart001]

What it should look like, with reflections…
Note all the mirrored reflections along the side of the fuselage.

[Forester64]

Inspect how textures were packed before and after, gltf packs Ambient Occlusion, Roughness, Metallic into RGB (they also called ORM textures because of that order). Maybe order is incorrect somewhere.