gltfio can now ask the material provider plugin which `Material` would be used for a given set of requirements. Prior to this change, gltfio could only create a new `MaterialInstance`. This method is necessary to support an upcoming gltfio feature.
gltfio can now ask the material provider plugin which `Material` would be used for a given set of requirements. Prior to this change, gltfio could only create a new `MaterialInstance`. This method is necessary to support an upcoming gltfio feature.