Dimension: 807 H, 540 W, 459 "D

Seat: 410 "H,

Units: MM

Poly: 133,000

Vert: 144000

Texture paths are stripped

Models unwrapped manually

Lighting is not included

3DsMax 2014 / OBJ

https://www.hermanmiller.com/products/seating/side-chairs/keyn-chair-group/ 

Preview rendered in Vray 5

When using a model in max format, if necessary, enable the Meshsmooth modifier.

Who works in V-Ray version lower than 3.1, be careful, in the materials in the BRDF section there is Microfaset GTR (GGX), your version is older than 3.1, then the BRDF field will be empty. Choose Blinn, Phong or Ward - which is preferable for you