Materials tab
Limitations when importing from other applications

Supported Model file formats

Note: This section provides information about proprietary file formats that use FBX conversion. However, there are two file formats that do not use FBX as an intermediary: SketchUp and SpeedTree. For more information about importing these file formats, see the SketchUp Settings and SpeedTree topics.

Unity supports importing Meshes and animation from two different types of files:

Unity は両方の形式のファイルをインポートできます。各形式に長所と短所があるため、どちらを選ぶか検討が必要です。

Exported 3D files

Unity can read .fbx, .dae (Collada), .3ds, .dxf, and .obj files. For information about exporting 3D files, see Exporting from other applications or read the documentation for your 3D modeling software.


  • You can import only the parts of the model you need instead of importing the whole model into Unity.
  • エクスポートしたジェネリックファイルは、エクスポートしていないファイルよりもサイズが小さいことがあります。
  • エクスポートしたジェネリックファイルを使用すると、コリジョンの型や相互関係性ごとに異なるコンポーネントを使用するなど、モジュール単位でのアプローチが推進されます。
  • Unity が直接サポートしていないソフトウェアのファイルも読み込むことができます。
  • You can re-import exported 3D files (.fbx, .obj) into 3D modeling software after exporting, to ensure that all of the information has been exported correctly.


  • You must re-import models manually if the original file changes.
  • You need to keep track of versions between the source file and the files imported into Unity.

Proprietary 3D application files

Unity can import proprietary files from the following 3D modeling software:

Warning: Unity converts proprietary files to .fbx files as part of the import process. However, it is recommended that you export to FBX instead of directly saving your application files in the Project. It is not recommended to use native file formats directly in production.


  • Unity automatically re-imports the file if the original model changes.
  • This is initially simple; however it can become more complex later in development.


  • A licensed copy of the software used must be installed on each machine that uses the Unity Project.
  • Software versions should be the same on each machine using the Unity Project. Using a different software version can cause errors or unexpected behavior when importing 3D models.
  • ファイルが不要なデータで満杯になることがあります。
  • Big files can slow down Unity Project imports or Asset re-imports, because you have to run the 3D modeling software you use as a background process when you import the model into Unity.
  • Unity は、インポートの過程で内部的にプロプライエタリファイルを .fbx にエクスポートします。このため、.fbx データを検証し問題をトラブルシュートすることが難しくなります。

Note: Assets saved as .ma, .mb, .max, .c4d, or .blend files fail to import unless you have the corresponding 3D modeling software installed on your computer. This means that everybody working on your Unity Project must have the correct software installed. For example, if you use the Autodesk® Maya LT™ license to create ExampleModel.mb and copy it into your Project, anyone else opening that Project also needs to have Autodesk® Maya LT™ installed on their computer too.

Materials tab
Limitations when importing from other applications