Curtains and tulle for skylights on separate double-row cornices.
The scene contains a simplified model of a window in the wall at an angle.
The color of the model can be easily changed in the material settings.

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.

If you are working in a V-Ray version lower than 3.1 then be careful in the materials in the BRDF section there is Microfaset GTR (GGX) if your version is older then the BRDF field will be empty. Choose Blinn Phong or Ward – whichever is preferable for you.