Nere pendant lamp model
https://cornerdesign.ru/shop/nere 
-V-Ray render and materials
-Corona render and materials
Materials created without using converters
-The turbosmooth modifier is applied to the models (display in the viewport - 0 iterations, on the render 2 iterations)
If the CORONA version is higher than 1.4: “For Corona render, it is recommended to install the version no lower than 1.5, since the glossiness of the materials is adjusted taking into account PBR
Those who work in a 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 – whichever is preferable for you