https://www.bruvel.com/wall-pieces/bending-the-lines-10 It is recommended to install the Corona version at least 1.5, since the glossiness of the materials is configured with PBR in mind. Those who work in V-Ray versions lower than 3.1 be careful, the materials in the BRDF section contain Microfacet GTR ( GGX), if your version is older than 3.1, then the BRDF field will be empty. Choose Blinn, Phong or Ward – which is preferable for you
