Lambda Chair by Rim in 6 Colors

Made according to the dimensions and photos from the manufacturer's website:
https://www.architonic.com/en/product/rim-lambda-la-4001-090/20776158 

Dimensions of the Lambda chair model:
Length: 58.3 cm (23.0 in)
Width: 53.3 cm (21.0 in)
height: 82 cm (32.3 in)

number of polygons/vertices of the chair:
4644 polygons
4809 vertex

There is 1 copy of the model saved in the scene, the model has its own configured material assigned. There are 6 spheres next to the model, each of them has its own material applied.

All objects have normal names.
All materials have convenient names.
All textures have a unique name.

The model in the scene has a Turbosmooth modifier assigned to it in Render Iterations=2 mode, which is applied only during rendering.
In the obj file, the model is saved with Turbosmooth=2 applied. The model is saved separately without Turbosmooth applied.

Pivot Point is aligned to the center of the model.

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.

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.