Staircase for home library

Modern staircase for the home library. Can be made in other sizes.
For close angles, add the TurboSmooth modifier to the necessary elements.

Dimensions:
Width: 770mm
Depth: 610mm
Height: 2750mm
Polys: 29048
Verts: 29732

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.
For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is configured with PBR in mind.