Render previews are done in Corona Render 12. The model uses Corona Legacy Mtl. A version of Corona Render no lower than 1.5 is required.
Material conversion to V-Ray was performed using the standard V-Ray scene converter. V-Ray version - 6.2

The model does not have a proper polygonal mesh. This is done intentionally to maximize the geometry and weight reduction of the model for comfortable work.

Floor lamp - Moderli Birds V3073-1TL

Poly: 6 853
Verts: 7 196

Those working in V-Ray versions lower than 3.1 should be careful, as the materials in the BRDF section use Microfaset GTR (GGX). If your version is older than 3.1, the BRDF field will be empty. Choose Blinn, Phong, or Ward – whichever is preferable for you.

For Corona render, it is recommended to use a version no lower than 1.5, as the glossiness of materials is set with PBR in mind.