A 3D viewer for VRM / FBX / PMX / PMD / OBJ / STL / DirectX .x files.
Latest release: popone-v0.5.18.exe
All releases: Releases
Model: Alicia Solid — (C) DWANGO Co., Ltd. / Character Design: 黒星紅白
- The author assumes no responsibility for any issues arising from the use of this tool.
- The user interface is localized in Japanese, English, and Chinese, following the OS language setting (can be overridden with the
POPONE_LOCALEenvironment variable:ja/en/zh).
0BSD License — Free to use, modify, and redistribute without attribution.
Bundled third-party assets (fonts, etc.) are under their own licenses. See THIRD_PARTY_NOTICES.md for details.
See Usage for details.
Requires Rust (stable).
# CLI only (converts VRM / FBX / OBJ / STL / DirectX .x / UnityPackage / ZIP / 7z / RAR to PMX)
cargo build --release
# With viewer (3D viewer GUI)
cargo build --release --features viewerOn Windows, Windows SDK is recommended for embedding the exe icon (rc.exe). If not installed, the build will succeed but the exe will have no custom icon.
Core (CLI conversion)
| Crate | Purpose |
|---|---|
| gltf | GLB/glTF 2.0 parser (with extensions feature) |
| serde / serde_json | VRM extension JSON deserialization |
| glam | 3D math (Vec3, Quat, Mat4) |
| byteorder | PMX binary read/write (little-endian) |
| image | Texture PNG/JPEG/BMP/TGA decode/encode |
| mikktspace | MikkTSpace tangent vector generation (for normal maps) |
| encoding_rs | PMD Shift_JIS text conversion |
| flate2 | zlib compression/decompression |
| tar | .unitypackage (tar.gz) extraction |
| zip | ZIP archive extraction |
| sevenz-rust2 | 7z archive extraction |
| unrar | RAR archive extraction (official UnRAR library) |
| tobj | OBJ/MTL parser |
| toml | TOML config parser |
| dunce | UNC path simplification |
| tempfile | Temporary file creation |
| clap | CLI argument parser |
| anyhow / thiserror | Error handling |
| log / fern / chrono / env_logger | Logging |
| rayon | Parallel iteration (UnityPackage asset processing) |
| pathdiff | Relative path computation (MME .fx #include resolution) |
| rust-i18n / sys-locale | UI localization (ja / en / zh) and OS locale detection |
Viewer (viewer feature)
| Crate | Purpose |
|---|---|
| eframe | egui + wgpu window framework |
| rfd | Native file dialog |
| bytemuck | Vertex/uniform Pod conversion |
| encase | Uniform buffer serialization (glam integration) |
| pollster | Async blocking executor |
Dependency Licenses
| Crate | License |
|---|---|
| gltf | MIT OR Apache-2.0 |
| serde / serde_json | MIT OR Apache-2.0 |
| glam | MIT OR Apache-2.0 |
| byteorder | Unlicense OR MIT |
| image | MIT OR Apache-2.0 |
| mikktspace | MIT OR Apache-2.0 |
| encoding_rs | MIT OR Apache-2.0 |
| flate2 | MIT OR Apache-2.0 |
| tar | MIT OR Apache-2.0 |
| zip | MIT |
| sevenz-rust2 | Apache-2.0 |
| unrar | MIT OR Apache-2.0 (bindings) / UnRAR license (bundled UnRAR source; see THIRD_PARTY_NOTICES.md) |
| tobj | MIT |
| clap | MIT OR Apache-2.0 |
| anyhow / thiserror | MIT OR Apache-2.0 |
| log / fern / chrono | MIT (fern) / MIT OR Apache-2.0 (others) |
| toml | MIT OR Apache-2.0 |
| dunce | CC0-1.0 OR MIT-0 OR Apache-2.0 |
| tempfile | MIT OR Apache-2.0 |
| env_logger | MIT OR Apache-2.0 |
| rayon | MIT OR Apache-2.0 |
| pathdiff | MIT OR Apache-2.0 |
| rust-i18n | MIT |
| sys-locale | MIT OR Apache-2.0 |
| Crate | License |
|---|---|
| eframe | MIT OR Apache-2.0 |
| rfd | MIT |
| bytemuck | Zlib OR Apache-2.0 OR MIT |
| encase | MIT OR Apache-2.0 |
| pollster | MIT OR Apache-2.0 |
This software reads and converts the following file formats. All trademarks are the property of their respective owners.
- VRM — 3D avatar format by VRM Consortium
- FBX — FBX is a trademark of Autodesk, Inc.
- glTF / GLB — glTF is a trademark of the Khronos Group Inc.
- DirectX .x — DirectX is a trademark of Microsoft Corporation
- PSD — Photoshop and PSD are trademarks of Adobe Inc.
- PMX / PMD — Formats originating from MikuMikuDance (樋口M) and PMXEditor (極北P)
- OBJ — Wavefront OBJ, originally by Wavefront Technologies
- STL — Originally developed by 3D Systems for stereolithography
This software detects and approximates the following shader technologies for PMX conversion:
- MToon — Toon shader specification by VRM Consortium / Santarh (MIT License)
- UTS2 (Unity-Chan Toon Shader 2.0) — by Unity Technologies (Unity-Chan License 2.0)
- lilToon — by lilxyzw (MIT License)
- Poiyomi Toon Shader — by Poiyomi