Are you looking to add some new 3D models to your MikuMikuDance (MMD) project? OBJ files are a popular file format for 3D models, and you can easily import and open them in MMD. Here's a step-by-step guide to help you get started.

Step 1: Download and install the PMXEditor tool. This tool is essential for converting OBJ files to PMX format, which is compatible with MMD.

Step 2: Open PMXEditor and click on 'File' > 'Import' to select the OBJ file you want to open. The OBJ file will be converted to PMX format.

Step 3: Once the OBJ file is converted to PMX format, save the file and close PMXEditor.

Step 4: Open MMD and go to the 'File' menu. Click on 'Load,' and select the PMX file you just created.

Step 5: Your 3D model from the OBJ file should now be successfully imported into MMD. You can now use it in your animations and projects!

Remember, it's important to check the terms of use for any 3D models you download and ensure they are compatible with MMD. Some models may require additional steps or adjustments to work properly in MMD.

By following these steps, you can easily import and open OBJ files in MMD for your 3D modeling and animation projects. Whether you're creating a dance routine, a music video, or a short film, having a variety of 3D models at your disposal can take your projects to the next level. Enjoy exploring new possibilities with OBJ files in MMD!