Version: 2020.2
Asset workflow

Common types of assets


Unity supports most common image file types, such as BMP, TIF, TGA, JPG, and PSD. If you save your layered Photoshop (.psd) files in your Assets folder, Unity imports them as flattened images. You can find out more about importing images with alpha channels from photoshop, or importing your images as sprites

FBX とモデルファイル

As Unity supports the FBX file format, you can import data from any 3D modeling software that supports FBX. Unity also natively supports importing SketchUp files. For information on how to get the best results when exporting your FBX files from your 3D modeling software, see Optimizing FBX files.

Note: You can also save your 3D files from most common 3D modeling software in their native format (for example, .max, .blend, .mb, .ma). When Unity finds them in your Assets folder, it imports them by calling back to your 3D modeling software’s FBX export plug-in. However, it is recommended to export them as FBX.


使用する 3D モデリングソフトウェアの種類に関係なく、Unity は各ファイルからメッシュとアニメーションをインポートします。Unity がサポートする 3D モデリングソフトウェアのリストについては、サポートされているモデルのファイル形式 を参照してください。

メッシュファイルにアニメーションをインポートする必要はありません。アニメーションを使用する場合は、すべてのアニメーションを 1 つのファイルからインポートしたり、それぞれに 1 つのアニメーションを含む複数のファイルをインポートすることができます。それぞれのアニメーションは 1 つのアニメーションで行います。アニメーションのインポートに関する詳細は、モデルのインポート を参照してください。


If you save uncompressed audio files into your Assets folder, Unity imports them according to the compression settings specified. Read more about importing audio files.

Other asset types

In all cases, Unity never modifies your original source file, even though you can often choose between various ways to compress, modify, or otherwise process the asset within Unity. The import process reads your source file, and creates a game-ready representation of your asset internally, matching your chosen import settings. If you modify the import settings for an asset, or make a change to the source file in the Assets folder, that causes Unity to re-import the asset again to reflect your changes.

Note: Importing native 3D formats requires that the 3D modeling software be installed on the same computer as Unity. This is because Unity uses the 3D modeling software’s FBX Exporter plug-in to read the file. Alternatively, you can directly export as FBX from your application and save in your project folder.

Standard Assets

Unity ships with multiple Standard Assets. These are collections of assets that most Unity customers use. These include:

  • 2D
  • Cameras
  • Characters
  • CrossPlatformInput
  • Effects
  • Environment
  • ParticleSystems
  • Prototyping
  • Utility
  • Vehicles

To transfer Standard Assets in and out of projects, Unity uses Asset packages, available on the Unity Asset Store. Asset packages allow you to share and re-use Unity projects and collections of assets.

Note: You can download Standard Assets from the Asset Store.

Assets in the Unity Package Manager

You can install a wide range of assets, including plug-ins, tools, and libraries directly into Unity through the Unity Package Manager (UPM). These are a new type of package, and are available through the Package Manager window. For more information about packages in general, see the Packages documentation.

Asset workflow