Curtain with goblet pleat and thin edge along the bottom and side edges of the fabric. Suitable for a width of 3m.
The scene includes a simplified model of a window in the wall, a simplified model of a cornice.
The colors of the model can be changed in the material settings.

https://3dsky.org/collection/shared/5255126  collection of my curtains.

For Corona render, it is recommended to use version 1.5 or higher, as the glossiness of the materials is set considering PBR.

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