Handmade carpet Lava from Carpet Edition
Part of The Floor Is Lava collection, this water-resistant rug boasts a dramatic asymmetrical design where the lines curve as if melted by some kind of heat source.
in gray: https://artemest.com/products/the-floor-is-lava-carbon-angled-black-gray-rug-by-placee#q=142c44876bd261e6a2267c3642e1df53 
in red: https://artemest.com/products/the-floor-is-lava-fire-line-angled-red-white-rug-by-placee 

The object is single, textures and material have logical names
TurboSmooth open

For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is configured taking into account PBR

Those who work in V-Ray versions 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 suits you best