V-Ray versions are lower than 3.1, be careful, in the materials in the BRDF section there is Microfaset GTR ( GGX ), if your version is older than 3.1, then the BRDF field will be empty. Choose Blinn, Phong or Ward - whichever suits you best"

For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is configured with PBR in mind.

link:
https://www.lakiq.com/fr/white-modish-upholstered-accent-bench-with-rear-seat-back-upholstered-in-solid-color-63l-x-24w-x-31h-s-1247402.html