If you've been working with 3D models, you may have come across the PDO file format. While PDO is commonly used in Pepakura Designer for creating papercraft designs, it's not as widely supported as the OBJ format. Converting a PDO file to OBJ can make it easier to share and work with your 3D models across different platforms and software. Here's how to do it:

1. Open your PDO file in Pepakura Designer. If you don't have Pepakura Designer, you can download a free trial version from the official website.

2. Once your file is open, go to File > Export as OBJ. This will give you the option to choose a location to save your OBJ file and specify any additional export settings.

3. After selecting the save location and any desired settings, click 'Export' to convert your PDO file to OBJ. Depending on the complexity of your 3D model, this process may take some time.

4. Once the export process is complete, you can open your newly created OBJ file in a variety of 3D modeling software or share it with others who may not have access to Pepakura Designer.

Converting a PDO file to OBJ can be incredibly useful for collaborating with others or utilizing different 3D modeling tools. Keep in mind that some details of the original PDO file, such as textures and colors, may be affected by the conversion process. It's a good idea to double-check your OBJ file in the intended software to ensure everything looks as expected.

In conclusion, converting a PDO file to OBJ format can significantly expand the usability of your 3D models. Whether you're working on a collaborative project or simply need to use different software for your 3D work, knowing how to save a PDO file as OBJ is a valuable skill for any 3D enthusiast.