Corona 9 version
Materials CoronaLegacyMtl + Vray
Vray materials obtained using Vray-converter

The material of the towels allows you to change the color with a procedural card.

CoronaLegacyMtl requires a version of Corona Renderer at least 1.5 since the cards are designed to use PBR (roughness-metallic)

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.
All cards are designed for the PBR roughness-metallic workspace.