High back office chair

Modern swivel office chair with casters. The seat is made of leather.
Model weight without Turbosmooth: 69770 polygons, 70465 vertices
The leather part of the seat has a full unwrap, all small details (seams, folds) are baked into a normal map.
There are two copies of the model in the scene, each with its own prepared material assigned to the seat: white leather and black leather.
The pivot point is aligned to the center and bottom of the model base.
All materials have unique names. All objects in the scene have unique names.
The archive contains files for 3dsmax 2016, versions for V-ray and Corona.
Who works in V-Ray version lower than 3.1, be careful, in the materials in the BRDF section there is Microfacet 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 a version not lower than 1.5, since the glossiness of the materials is adjusted taking into account PBR.