Showcase Fiam – Echo.
Design Marcel Wanders studio.

There is also a showcase model from this series but with different sizes and a different shape:
https://3dsky.org/3dmodels/show/vitrina_fiam_echo_ecv250 

The scene contains 8 color variations:
Champagne finish structure extralight glass
Champagne finish structure semi-reflecting glass
Champagne finish structure fused extralight glass
Champagne finish structure fused bronze glass
Vulcan grey finish structure extralight glass
Vulcan grey finish structure smoked glass
Vulcan grey finish structure fused extralight glass
Vulcan grey finish structure fused smoked glass

All identical objects are instances. All objects have the Opensubdiv instance modifier. For long distances you can turn it off. FBX exported without Opensubdiv. One cabinet with fused glass consists of 266416 polygons with flat glass – 26438. All models have a correct UV maping without overlappings.

Vray version: 4+
Corona version: 7+ (CoronaPhysicalMaterial)