link:
https://www.wayfair.com/lighting/pdx/mercury-row-bast-31-table-lamp-mcrr2257.html 

Who works in the V-Ray version is 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 - which is preferable to you. ”


“For the Corona render, it is recommended to put a version not lower than 1.5, since the glossiness of the materials is adjusted for PBR.