Are you looking to export your Revit design into an obj file for 3D modeling or visualization purposes? Here's a simple guide to help you achieve that!

Step 1: Open your Revit project and navigate to the 3D view that you want to export as an obj file.

Step 2: Once you're in the desired 3D view, go to the 'File' menu and select 'Export' > 'CAD Formats' > 'OBJ'.

Step 3: In the export dialog box, choose a location to save the obj file and specify any additional export settings as needed.

Step 4: Click 'OK' to start the export process. Revit will convert your 3D model into an obj file format.

Step 5: Once the export is complete, you can use the obj file in 3D modeling software such as Blender, 3ds Max, or Unity for further editing or visualization.

Remember to check the compatibility of the obj file with the software you intend to use it in. You may need to adjust the export settings in Revit to ensure that the obj file meets the requirements of your 3D modeling software.

By following these simple steps, you can easily export your Revit design into an obj file and continue working on it in your preferred 3D modeling software. Good luck with your 3D modeling endeavors!