In the scene there is a model of the Mance couch and three materials of different colors.
https://www.divan.ru/product/kushetka-mans-barhat-forest 
Size: length = 2010 mm, depth = 780 mm, height = 890 mm.
Couch, number of polygons: 165,796
Decor (pillow+plaid), number of polygons: 151,244
Decorative pillow Kats https://www.divan.ru/product/dekorativnyj-chehol-kats-taiga-45x45 
- 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, whichever suits you best.
For Corona render, it is recommended to use a version of at least 1.5.