This is a rusty old Gas Exchange element as seen in an abandoned factory.
This asset was created in 3ds Max and rendered with V-Ray 3.6 or greater.
The Gas Exchange element is one element from a collection of elements that all share a small library of shaders (provided). The asset uses multiple UV channels with tiled maps in the shader. Each shader then uses a mask file to provide a unique, non tiled look. The masks are saved into a single PNG file. Each PNG file contains three masks in the R, G, B channels for economical use. Max then uses one of these channels in a Vray Blend shader to influence the tiles.
I've also made available the OBJ, FBX and ABC files. These files are setup with a single generic UV tile for flexibility in other programs. Note because this is aimed for general use, the shader / maps are different and will render different to the version setup for 3ds Max / Vray (preview images). Not any less good; just different.
Cinema 4D file provided. Please note this was created using a 3ds Max to Cinema 4D Converter.
I've provided a 3ds Max file with all the Factory Element shaders in one scene for alternative use and flexibility.
All shaders were created using Substance Painter.
This is one element from a series of Factory Elements that have a derelict feel. Please see my other products to discover the other elements in the collection.
Images were rendered with VrayRT, a single HDRI skydome, and a single rectangle light.