Render of the Showroom models:
https://www.behance.net/gallery/96044289/Provasi-Conchiglia 

Who works in the V-Ray version 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 – which is preferable for you

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.

Materials are combined into one multicomponent material and laid out in accordance with id. For the Vray option there is a sphere in the scene with the assigned multicomponent material. Attach the model select the group and simply assign this material to it.
Model fbx objects exported without TurboSmooth modifier.