Issue: Imported .glb and .glTF files from Sketchfab create disallowed materials functions. This is a problem because it blocks educators and creators who don’t understand the material workflow from adding assets to their projects.
This has been fixed as of 26.20 Sept. 26th 2023.
It is now possible to drag and drop .glb and .glTF files into the engine, and the material(s) that are auto-generated are allowed when pushing changes to FN.