Exporting GameObjects in Unity: A Comprehensive Guide

Quick answer

This page answers How do I export a game object in unity? quickly.

AnswerTipsNext

Fast answer first. Then use the tabs or video for more detail.

• Watch the video explanation below for a faster overview.
• Game mechanics may change with updates or patches.
• Use this block to get the short answer without scrolling the whole page.

• Read the FAQ section if the article has one.
• Use the table of contents to jump straight to the detailed section you need.
• Watch the video first, then skim the article for specifics.

Exporting GameObjects in Unity is a fundamental skill, essential for sharing assets, collaborating with others, and reusing elements across different projects. This process allows you to take individual or hierarchical objects and transform them into reusable files. It’s a cornerstone of efficient Unity development.

The primary method to export a GameObject is through the FBX format. Select the GameObject you wish to export, navigate to GameObject > Export To FBX, and save the resulting file. The FBX Exporter exports selected objects and their descendants to a single FBX file. However, if you select both a parent and a descendant, only the parent’s hierarchy is exported.

Diving Deeper: Methods for Exporting

While exporting to FBX is a common choice, Unity provides other options, including:

• Unity Packages: These are especially useful when you need to export GameObjects along with their associated assets like materials, textures, and scripts.
• Prefabs: Converting GameObjects to Prefabs is a powerful way to create reusable templates within the same project. This enables the rapid instantiation of pre-configured objects.
• FBX Prefab Variants: Exporting a GameObject as an FBX Prefab Variant allows exporting the GameObject into your chosen directory.

Exporting to FBX

This is your go-to method for transferring 3D models and scene structures to other applications or Unity projects.

1. Select Your GameObject: In the Hierarchy window, choose the GameObject you want to export.
2. Navigate to Export: Go to the menu bar and select GameObject > Export to FBX.
3. Configure Export Options: A window will appear allowing you to customize the export settings, such as the FBX version, texture handling, and scale factors. Pay close attention to these options to ensure compatibility and visual fidelity in the target application.
4. Choose Destination and Save: Select the desired folder and name your FBX file. Click “Save” to initiate the export process.

Creating Unity Packages

When your GameObject relies on specific materials, textures, or scripts, exporting a Unity Package ensures that all dependencies are included.

1. Select Assets: In the Project view, locate all assets associated with your GameObject. This includes the model, materials, textures, scripts, and any other relevant files.
2. Export Package: Right-click on the selected assets and choose Export Package….
3. Include Dependencies: A window will appear listing all the selected assets and their dependencies. Ensure that “Include dependencies” is checked.
4. Name and Save: Choose a name for your Unity Package and save it to your desired location. The package will be saved with a .unitypackage extension.
5. Import Package: In another project, go to Assets > Import Package > Custom Package…. Select the .unitypackage file you created to import the GameObject and all its associated assets.

Converting to Prefabs

Prefabs are a core feature of Unity, allowing you to create reusable templates of GameObjects.

1. Drag to Project View: Select the GameObject in the Hierarchy window and drag it into the Project view. This automatically creates a Prefab asset.
2. Prefab Variants: You can create variants of existing Prefabs. Right-click the original Prefab in the Project view and choose Create > Prefab Variant. Changes to the base Prefab will propagate to its variants.
3. Prefab Instances: Dragging a Prefab from the Project view into the Scene or Hierarchy creates an instance of that Prefab. Modifying a Prefab will affect all instances in your scene, unless you override specific properties.
4. FBX Prefab Variants: Right-click on the selection and select Convert To FBX Prefab Variant. Adjust the export properties in the Convert Options window and click Convert.

Best Practices for GameObject Exporting

• Organization: Maintain a clear and structured folder hierarchy in your Project view to easily locate assets for export.
• Naming Conventions: Use consistent and descriptive naming conventions for your GameObjects and assets. This makes it easier to identify and manage them.
• Texture Handling: When exporting to FBX, consider embedding textures within the FBX file or providing them separately. Choose the option that best suits your target application’s requirements.
• Version Control: Utilize a version control system like Git to track changes and collaborate effectively with others.
• Testing: Always test the exported GameObject in the target application to ensure that it is imported correctly and that all textures, materials, and animations are working as expected.
• Lightmaps: Ensure that you preserve the original Lightmap UVs and UV2 in the FBX file in order to get the object properly setup.

Frequently Asked Questions (FAQs)

1. How do I copy a GameObject from one Unity project to another?

The most reliable method is to use Unity Packages. Select the GameObject and all its dependent assets (materials, textures, scripts) in the Project window. Right-click and select “Export Package…”. In the target project, import the package via “Assets > Import Package > Custom Package…”.

2. How do I reuse assets between projects?

Similar to copying GameObjects, Unity Packages are the preferred method. Alternatively, you can manually copy asset files (e.g., .fbx, .png, .cs) between project folders, but this method doesn’t preserve asset dependencies or import settings, which can lead to errors.

3. How do I export a GameObject to a Prefab?

In the Hierarchy, select the GameObject you want to make a Prefab. Drag it from the Hierarchy window into the Project window. This creates a Prefab asset in your Project.

4. How do I export a Unity game as a zip file?

While you can zip the entire project folder, Unity provides a Collaborate feature (accessed through the Unity Developer Dashboard) that allows you to export a version of your project specifically for collaboration and distribution.

5. How do I export and import a project in Unity?

To export a project, the most common method is to right-click on the Assets folder in the Project Window and select Export Package.

6. How do I export a character in Unity?

Use GameObject > Export To FBX to manually export the character’s GameObject hierarchy. Ensure all necessary components (mesh, skeleton, animations) are included in the selected hierarchy. If animations are crucial, verify that the FBX export settings preserve animation data.

7. How do I import an object into Unity?

Drag the model file (e.g., .fbx, .obj) into the Project view in Unity. Select the file to view import settings in the Inspector. Adjust settings as needed for scale, materials, and animation. Finally, drag the imported object from the Project view into your Scene.

8. What file types does Unity export to?

Unity natively exports to the FBX format for 3D models and scenes. It also exports to .unitypackage for sharing assets and projects.

9. Is a Unity GameObject a Prefab?

No. A GameObject is an object in your scene. A Prefab is an asset in your Project that serves as a template for creating instances of GameObjects. A GameObject can become a Prefab by dragging it from the Hierarchy to the Project view.

10. How do I export a Prefab from Unity?

Right-click on the Prefab you wish to export in the Project View and select Export. This will export a . zip in the exports directory.

11. Can you 3D model in Unity?

Yes, Unity provides tools like ProBuilder for basic 3D modeling within the editor. However, for complex and production-quality models, it’s generally recommended to use dedicated 3D modeling software like Blender or Maya and then import the models into Unity.

12. How do I share a game project in Unity?

The easiest way to share a Unity project is using Unity Collaborate. Enable Collaborate in the Unity Editor, invite collaborators, and then “Publish” your changes.

13. What is FBX in Unity?

FBX is a common file format used to store 3D models, animations, and scene information. Unity uses FBX as its primary format for importing and exporting 3D assets.

14. What’s the difference between FBX and OBJ in Unity?

OBJ is a simpler format that primarily stores geometric data (vertices, normals, UVs). FBX is a more comprehensive format that can store models, animations, skinning information, and even embed textures. FBX is generally preferred for its richer feature set.

15. Does Unity use OBJ files?

Yes, Unity supports importing OBJ files, but FBX is generally the preferred format.

Conclusion

Exporting GameObjects in Unity is a versatile process that underpins many essential workflows. Whether you’re sharing assets, collaborating with others, or building reusable components, understanding the various export methods and best practices is crucial for efficient game development. Remember to always test your exported assets to ensure compatibility and visual fidelity in the target application. By using these techniques, you will be able to reuse assets and move the assets around as much as needed.

The principles of game design and learning are constantly evolving. To stay up-to-date on the latest research and innovations in the field, consider exploring resources from organizations like the Games Learning Society, accessible at https://www.gameslearningsociety.org/.