I've created a OBJ derivative from a F3D file with Forge DerivativeApi.
I also was able to download the OBJ derivative via getDerivativeManifest().
BUT: Where is, and how to get, the MTL file associated with and referenced in the OBJ file created by Forge?
getManifest() gives no information about a MTL file, just about the OBJ itself.
Regards, Michael