The model is made according to the dimensions and photos from the website of the furniture supplier:
https://bizchair. com/JJ-CC302.html

Dimensions:
height 95 cm
width 65 cm
depth 59 cm

Two copies of the chair are saved in the scene, each copy has its own customized material.

Legs, plastic and metal parts are grouped separately in the model, the Turbosmooth modifier is assigned to this group in the Rener Iterations=2 mode.
And all the fabric parts of the chair are grouped separately, without Turbosmooth.
In the obj file, the model is saved with Turbosmooth=1 applied.

All objects have normal names.
All materials have convenient names.

Model weight without Turbosmooth:
814372 polygons
816101 vertices

The Pivot Point is aligned to the center of the model.

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.

For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is configured with PBR in mind.