Poltrona Caipora

https://www.mauriciobomfim.com.br/produtos-1/poltrona-caipora 

Units: millimeters
Format: 3Ds Max 2018, OBJ
Renderer: V-Ray 5, Corona 6
Polygon Count (before TurboSmooth): 13,831
Chair size: 810x860x670 mm

Those who work 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. Select Blinn, Phong or Ward - what is preferable for you. You also need to add the VRayDisplacementMod modifier to the chair itself (a screenshot of the settings is in the archive).

For Corona render, it is recommended to install version not lower than 1.5, since the glossiness of materials is configured taking into account PBR.