Are you looking to convert your Windows 3D Viewer files to OBJ files? This process can be useful if you want to use your 3D models in other 3D modeling applications. Here's how to do it:

Step 1: Open the 3D Viewer app on your Windows computer.

Step 2: Load the 3D model that you want to convert to an OBJ file.

Step 3: Once the model is loaded, navigate to the 'File' menu and select 'Export'.

Step 4: In the export options, choose 'Wavefront OBJ' as the file format.

Step 5: Select a location on your computer to save the OBJ file, and then click 'Save'.

Step 6: Your 3D model has now been converted to an OBJ file and is ready to be used in other 3D modeling applications.

By following these simple steps, you can easily convert your Windows 3D Viewer files to OBJ files, allowing you to seamlessly use your 3D models in other 3D modeling applications. This process can be especially useful for those who work with 3D models and need to transfer them between different programs.

So, the next time you need to convert a 3D model from Windows 3D Viewer to an OBJ file, remember these steps and make the process quick and straightforward. With just a few clicks, you can have your 3D model ready to use in any 3D modeling software that supports the OBJ file format.