Convert X to PMX

Source format

X is a legacy 3D model format associated with Microsoft DirectX. It can store mesh geometry, materials, normals, texture coordinates, skinning, and sometimes animation data. X files were common in older Windows game pipelines and are now mostly found in archived or legacy assets.

Target format

PMX is the modern MikuMikuDance model format used for detailed character models. Compared with older MMD formats, PMX supports more advanced bones, vertex attributes, material controls, and model metadata. It is widely used for MMD characters and animation work.

How to convert X to PMX

X to PMX is usually not a direct one-click conversion. The formats belong to different ecosystems, so the safest workflow is to import the X model into a 3D editor, clean it up, and then export to PMX.

1. Install Blender and an MMD add-on such as MMD Tools. You can also use PMX Editor for inspection and final fixes.
2. Import the X file into Blender. Depending on your Blender version, you may need a DirectX/X importer add-on or a conversion step to an intermediate format such as .fbx or .obj.
3. Check the model carefully for missing textures, flipped normals, broken materials, or lost animation data. Legacy X files often need cleanup.
4. Prepare the model for MMD use by creating or adjusting the skeleton, fixing bone names, and making sure the mesh follows PMX conventions.
5. Export the model as PMX using the MMD add-on’s export option, typically found under File → Export → MikuMikuDance Model (.pmx) or a similarly named PMX export command.
6. Open the exported file in PMX Editor to verify bones, materials, morphs, and texture paths, then save the finished .pmx file.

Online converters and desktop tools

Direct X to PMX online conversion is uncommon and usually unreliable for textured or rigged models. If you only need a quick format hop, some online converters may handle .x to intermediate formats such as .obj or .fbx, but desktop software is strongly recommended for better control and fewer errors.

Reputable desktop options include Blender for import, cleanup, and export, plus PMX Editor for final validation. If your X file is very old or uses unusual DirectX features, you may need an additional converter before Blender can read it.

Quality limits to expect

Conversion quality depends on the source file. Static meshes are usually easier to migrate than animated or heavily rigged models. Common problems include lost animations, material mismatches, texture path issues, and bone hierarchy differences. PMX also expects MMD-style rigging and naming, so manual adjustment is often necessary.

Always keep a backup of the original .x file and test the result in PMX Editor and, if possible, MikuMikuDance before using it in a project.