Roman Curtains 181 | Roman Shade with Trim

The MeshSmooth modifier is not closed in the main file.
The MeshSmooth modifier is missing from the export (.FBX) file.

For Corona render, it is recommended to install a version of at least 1.5, since the glossiness of materials is configured taking into account PBR

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 - whichever suits you best

The archive contains:
MAX 2013 (V-Ray 5);
FBX_Vray;
MAX 2013 (Corona 6);
FBX_Corona;