Are you looking to export 3D models from Revit in OBJ format? OBJ files are widely used in the 3D modeling industry and are compatible with many software applications. Here's a step-by-step guide to help you export OBJ files from Revit.

1. Navigate to the 3D view: Start by opening the model in Revit and navigating to the 3D view that you want to export.

2. Adjust the model: Before exporting, make sure that your 3D model is clean and properly organized. Check for any overlapping geometry or unwanted elements that could cause issues during the export process.

3. Select the model: Once your 3D model is ready, select the elements that you want to export. You can use the selection tools in Revit to choose specific components or the entire model.

4. Export to DWG: Revit does not have a direct option to export OBJ files. However, you can export the model to DWG format as an intermediate step. Go to the 'File' menu, select 'Export', and choose 'CAD Formats'. Then, select 'DWG' as the file format and adjust the export settings as needed.

5. Convert to OBJ: After exporting to DWG, you can use third-party software to convert the file to OBJ format. There are various conversion tools available online, or you can use 3D modeling software like Blender, 3ds Max, or Maya to import the DWG file and export it as OBJ.

6. Check the output: Once the conversion is complete, review the OBJ file to ensure that it accurately represents your 3D model from Revit. Check for any missing elements, texture issues, or other discrepancies that may require further adjustments.

7. Fine-tune as needed: Depending on the intended use of the OBJ file, you may need to fine-tune the model in the software of your choice. This could involve adjusting materials, scaling, or optimizing the geometry for specific applications.

By following these steps, you can successfully export OBJ files from Revit and incorporate them into your 3D modeling workflow. Whether you're collaborating with other designers, working on visualizations, or preparing files for 3D printing, having the ability to export OBJ files opens up a world of possibilities for your Revit projects.

In conclusion, exporting OBJ files from Revit may require an extra step of converting the model from DWG format, but it's a manageable process that can greatly expand the versatility of your 3D modeling work. Keep in mind that the specific export and conversion steps may vary depending on the software tools you have available, so don't hesitate to explore different options and find the best workflow for your needs.