How to export/Convert Revit file to OBJ/FBX
Accepted answer
You can try free plugin from Visionworkplace
Revit OBJ Exporter - https://visionworkplace.com/products/obj-converter-for-autodesk-revit
Revit FBX Exporter - https://visionworkplace.com/products/fbx-converter-for-autodesk-revit
1 Other answer
Check this plugin:
https://apps.autodesk.com/RVT/en/Detail/Index?id=7235857835547931060&appLang=en&os=Win64
The free trial is for 7 days, supporting all features...