OSPData/adera/ph_rcs.sturdy.gltf references unknown file ph_metal-ph_rough.png

> grep -I -e ph_metal -r .

```
./bin/OSPData/adera/ph_rcs.sturdy.gltf:            "name" : "ph_metal-ph_rough",
./bin/OSPData/adera/ph_rcs.sturdy.gltf:            "uri" : "ph_metal-ph_rough.png"
```

