Sofa: ANGELO CAPPELLINI Cosmo modular
Units: Millimeters
Polys: 535.870
Verts: 458.446
straight https://3dsky.org/3dmodels/show/angelo_cappellini_cosmo 
armchair
https://3dsky.org/3dmodels/show/armchair_angelo_cappellini_cosmo 
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Who works in 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