The scene contains a Hege by Shake table model and a Frame by Shake chair model.
-Table Hege http://www.shake-design.it/en/prodotti/hege-8/ 
Size: diameter = 1 750 mm height = 766 mm
Number of polygons: 10 386
– Chair Frame http://www.shake-design.it/en/prodotti/frame-4/ 
Dimensions: width = 560 mm depth = 650 mm height = 700 mm
Number of polygons: 36 836
– Who works 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 – which is preferable for you.
For Corona render it is recommended to use version 1.5 or higher.