GLB Models Import Problems.
The image is viewable and readable in paint3d (windows), 3dviewer and is visible in explorer via 3dViewer.
I uploaded the piece to a site, minted it and redownloaded it. Attempted to import that way and received an "invalid file format" response and an X through the model.
The downloaded file is visible in explorer, 3d Viewer.
So upshot is, the importer seems to be having difficulty reading some glb models.
EDIT: Tested import into blender. Imports fully with materials. Possible that the final version of the model was created there, lost track of the exact process, was shotgunning import strategies