Chair model from the renowned designer PHILIPPE STARCK.

The model is made in size and photo from the site:
https://www.kartell.com/GB/all/q-wood/04913 

5 copies of the model are saved in the scene each with its own prepred material.
On the models the Turbosmooth modifier is assigned in the Render Interations = 2 mode which is applied only during rendering.

All models have unique names.
All materials have unique names.

The pivot point of the models is aligned to their center.

Model weight without Turbosmooth:
3900 polygons
3916 vertices

Who works in V-Ray version 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 – which is preferable for you.

For Corona render it is recommended to install at least version 1.5 as the glossiness of the materials is adjusted with PBR in mind.