Polys: 88959

In max-file on all objects Turbosmooth modifier in obj format – without it.

Model contains Multi/Sub material.
Turbosmooth modifier – instance on all objects Render Iters is checked.

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 – whatever suits you best.