Are you looking to export OBJ files from Source SDK for your 3D modeling or game development project? Here's how you can do it:

1. Open Source SDK: Launch the Source SDK tool and load the map or model that you want to export as an OBJ file.

2. Set Up the Scene: Position the camera and lighting in the Source SDK viewport to capture the desired angle and lighting for your model.

3. Select the Model: Use the selection tool to choose the specific model or models that you want to export as OBJ files.

4. Launch the Model Viewer: Launch the model viewer within Source SDK to ensure that your models are properly set up and ready for export.

5. Export as OBJ: Once your models are ready, navigate to the export settings and choose to export the selected models as OBJ files.

6. Configure Export Settings: Set the export options, such as scale and any additional attributes, to ensure that the exported OBJ files meet your project's requirements.

7. Save the OBJ Files: Choose a directory on your computer to save the exported OBJ files from Source SDK.

8. Import into 3D Software: With your OBJ files saved, you can now import them into your preferred 3D modeling software for further editing and integration into your project.

By following these steps, you can successfully export OBJ files from Source SDK for use in 3D modeling and game development. Whether you're working on creating custom assets for a game or creating stunning 3D visualizations, the Source SDK provides a streamlined process for exporting OBJ files to bring your vision to life.