The model is a fimet dental unit that includes plastic, steel, and iron materials. The model was modeled in 3D Max 2016, and its materials and rendering were done with Vray.
“Who works with V-Ray version lower than 3.1, pay attention to materials section BRDF (Microfaset GTR (GGX)), if your version is older than 3.1 - this section will be empty, and you have to choose: Blinn, Ward or Phong, d dependence on material “.