Chess. The size of the chessboard is 315 mm x 315 mm x 22 mm.

Polys: 466,580 (whole scene)
Verts: 468,993 (whole scene)

It is very important when loading texture maps to keep the gamma values set (Automatic or Override 1.0). Diffuse and Reflection maps are loaded with Automatic. Override 1.0 is set to load Reflection Glossiness, Opacity, Fresnel IOR and Normal maps.

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 a version not lower than 1.5, since the glossiness of the materials is adjusted taking into account PBR.