Polyester Felt Arc Wall Acoustic Panel
https://stone-dsgns.com/proyectos/arc/ 
The design is inspired by the arcades of the Colosseum in Rome and can be used in many vertical and horizontal configurations.
Panels reflect annoying sounds and reliefs absorb sound waves

The scene features:
– base element (dimensions of 1 panel: 450*70*900 mm)
– 4 combinations of panels (dimensions of one composition 3600*70*3600 mm)
– 4 shades of felt material (PBR material)

All objects are attached have logical names of materials and textures
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