Corona version 9
The model uses materials that may not be displayed correctly in very old versions of the engine.

Set of Cone wall panels
4 trim options
4 panel options, 3300 and 5000 mm long
The textures of the stone are selected with https://arch-skin.ru/ 

Objects are partially attached, textures and materials have logical names
Texturing UnwrapUVW

For Corona render, it is recommended to install a version not lower than 1.5, since the glossiness of materials is configured with PBR in mind.

Who works in a V-Ray version lower than 3.1 be careful, there is a Microfaset GTR ( GGX) in the materials in the BRDF section, 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