Ceiling made of bent brass sheets. The scene contains the TurboSmooth modifier - 1 Render iters, the stack is not collapsed. There is no modifier in the export file. When using the export file and applying the anti-aliasing modifier, be sure to enable anti-aliasing groups. There are no light sources in the scene! File format: - 3ds Max 19 corona render - 3ds Max 19 vray - O.B.J. Those who work 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 - whichever is preferable for you. For Corona render, it is recommended to install version no lower than 1.5, since the glossiness of the materials is adjusted taking into account PBR.