Three different types of wood are assigned to the chairs, and for the table, there are three spheres with different materials in the file.

TurboSmooth is applied to the objects, the recommended value is 2.

Circus Table - Ø 110 x H. 74 cm
Tornado Stool - Ø 38 x H. 44 cm

https://www.riva1920.it/en/products/living-and-dining-furniture/tables/circus
https://www.riva1920.it/en/products/living-and-dining-furniture/stools/tornado-stool
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Those working in V-Ray versions lower than 3.1 should be careful; in the materials section, BRDF is set to Microfaset GTR (GGX). If your version is older than 3.1, the BRDF field will be empty. Choose Blinn, Phong, or Ward – whichever is preferable for you.

For Corona render, it is recommended to use a version no lower than 1.5, as the glossiness of the materials is set with PBR in mind.