This is an evolution and merger of the Autodesk Standard Surface and Adobe Standard Surface. Edit: removed mention of subset/superset since his post corrected

This is an evolution and merger of the Autodesk Standard Surface and Adobe Standard Surface. Edit: removed mention of subset/superset since his post corrected the typo But yes there’s overlap as there will be in any PBR definition and I think the glTF spec can be considered a subset of this, closer to the preview variant.