Metal staircase with wooden steps and arched railings

Corona version 9
Materials of CoronaLegacyMtl + Vray

CoronaLegacyMtl requires a version of Corona Renderer at least 1.5, since the cards are designed to use PBR (roughness-metallic)

Vray materials are obtained using Vray-converter
Who works in a V-Ray version lower than 3.1 be careful, in the materials in the BRDF section there is a 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.
All cards are designed for the PBR roughness-metallic workspace.

Textures and materials have logical names
Texturing UnwrapUVW

Reference: https://www.archilovers.com/projects/267350/milano-paramigiano-gallery  ?2634498
The Milano Paramigiano project by Tatiana Ponomarenko

There are 3 variants of the staircase design in the scene: straight, angular and U-shaped
The height of the span is 2800 mm, the width of the steps is 1000 mm
The perforation on the metal is made using an opacity card