https://americanlg.ru/lighting/wall/TOB2033PN-NP 

Double sections of VRay + Corona. If your main Corona engine, we recommend not using scripts for conversion and all materials VRay create manually. Carefully check each material so that in the materials Vray, in the card slots did not remain Corona Bitmap and tp. If you chose the format of FBX as export, do not forget to attach both export files - both VRay and Corona. If the weight of the archive does not allow saving two export files, then we recommend using the OBJ format as the export format, this export format does not contain material information.