The archive contains a 3ds max 2018 scene for Corona + fbx file.

Curtain with piping.

CoronaLegacyMtl Materials
In CoronaRender 6 and below CoronaLegacyMtl=CoronaMtl.
CoronaLegacyMtl requires Corona Renderer version 1.5 or higher, as the maps are designed to use PBR (roughness-metallic).
Poly: 185,852
Verts: 94,804

Textures and materials have logical names.

The turbosmooth modifier is applied to the model (display in the viewport - 0 iterations, on the render - 1 iteration). If necessary, you can increase or decrease the number of smoothing iterations.