Why no discussions tag for gltfast? Unity glTFast Documentation | Unity glTFast | 6.8.0
How can we get package related support?
Anyway gltfast - GltfImport - checks for Root.scene < 0 and cancels load if this is true.
I found for some files they had no root scene defined but there was a scene there to instantiate so perhaps there can be space for an override of the function to instantiate scene 0 if no root scene is defined (even if that is the gltf specification!). Otherwise I may need to modify the actual package, or perhaps implement a different importer