Colors in Corona are changed through CoronaColor. The file has already selected 18 primary colors provided by the manufacturer. For Vray colors are connected to VrayMultiSubTex to change colors you need to connect the desired VrayColor directly to the material.

All objects are made for anti-aliasing. All objects and materials in the scene are logically named and grouped.
Turbosmooth stack included.
Viewport iterations – 0
Render iterations – 1

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.
Those who work in V-Ray versions 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 – whatever suits you best.