Panel in the form of a flow of scales. The materials are made using 3DsMax procedural maps. You can easily change the color of the panel and the material. The spots on the panel were made using the Noise card. You can achieve different patterns of spots by changing the parameters of the Noise map or remove it for a single color. It is recommended to install the Corona version at least 1.5, since the glossiness of materials is adjusted taking into account PBR. Those who work in a V-Ray version lower than 3.1, be careful, in the materials in the BRDF section there is Microfacet 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