A set of terry and waffle towels in different positions.
Towel colors can be easily edited in the material settings.

The Hair and Fur modifier has been applied to the brush model, screenshots of the settings have been added to the archive.

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.