3d model - cast iron radiator The render was done using Corona renderer 4 Who works in the 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. ” If CORONA version is higher than 1.4: “For Corona render, it is recommended to install version no lower than 1.5, as the glossiness of materials is adjusted taking into account PBR Polygons: 638820 Points: 64272