MEBEL-PARTNER Bar stools with or without backrest Dimensions: 520x520x1060 mm Poly: 94172 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.