All elements have the correct expansion and unique names. File saved in 3Ds MAX 2013 version Corona renderer 6.0
V Ray 3.6For Corona render, it is recommended to set the version to at least 1.5,
since the glossiness of materials is adjusted to PBRWho works in V-Ray version lower than 3.1, be careful in the materials in the BRDF section there is a Microfaset GTR ( GGX ), if your version is older than 3.1 then the BRDF field will be empty. Choose Blinn, Phong or Ward - whatever suits you best.