If you're a 3D artist using Maya, you may need to export your models in a format that can be easily shared or used in other software. One popular file format for 3D models is OBJ, and Maya makes it easy to export your models in this format. Here's how to do it:

1. Select your 3D model: Open your Maya scene and select the 3D model you want to export as an OBJ.

2. Go to File menu: Click on the 'File' menu at the top of the Maya interface.

3. Choose Export Selection: From the File menu, choose 'Export Selection' to bring up the export options.

4. Set OBJ as the file type: In the export options window, choose 'Wavefront OBJ' from the 'Files of Type' dropdown menu. This will ensure that your model is exported in the OBJ file format.

5. Set export options: Maya will present you with a few options for how you want to export the OBJ file. You can adjust settings like the file name, scale, and whether to export materials or textures along with the model.

6. Click Export: Once you've set your export options, click the 'Export' button to save your 3D model as an OBJ file.

And that's it! You've successfully exported your 3D model as an OBJ file in Maya. Now you can easily share your model with others or use it in other 3D modeling software.

Remember that OBJ files only store the geometry of the 3D model, so if your model uses materials or textures, you may need to also export those and package them with the OBJ file.

Exporting your 3D models in different file formats is an important part of the 3D modeling workflow, and Maya makes it simple to do so. Whether you're sharing your work with colleagues or collaborating with other artists, knowing how to export your models in different file formats like OBJ is a valuable skill to have as a 3D artist.

With these steps, you can easily export your 3D models as OBJ files in Maya and continue creating amazing 3D art!