Decorative fabric ceiling with lighting. Pay attention to the dimensions of the model. This is a fairly large ceiling, which can be scaled to suit your needs. For faster rendering, you can enable Clip in the material settings in the Opacity section for Corona (Opacity mode for Vray). In this case, the opacity will be calculated in a simplified way, which may affect the result. It is recommended to install Corona version not lower than 1.5, since the glossiness of materials is configured taking into account PBR. Those who work in V-Ray version lower than 3.1, be careful, in the materials in the BRDF section there is Microfacet GTR (GGX), if your version is older than 3.1, then the BRDF field will be empty. Choose Blinn, Phong or Ward - what is preferable for you
