Who works in a VRay version lower than 3.1 be careful, in the materials in the BRDF section there is a Microfaset GTR ( GGX ), your version is older than 3.1 , then the BRDF field will be empty. Choose Blinn, Phong or Ward – which is preferable for you
For Corona render, it is recommended to install a version not lower than 1.5, since the glossiness of materials is configured with PBR in mind
Enjoy your use and successful projects =)