Paintings with metal finish AMADEUS by Adriani e Rossi Edizioni
https://shop.adrianierossi.com/it/wall-art/10720-amadeus.html#/modelloset-as2senza_luce/set-senza_luce/modello-ac2 

Volumetric paintings from MDF with metal trim

Objects are attached have logical names of materials and textures
I recommend adding TurboSmooth for close angles

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