Blender Library Overrides: A Guide to Editing Linked Assets

What you’ll learn in this guide

Blender’s Library Overrides system lets you edit local copies of data blocks linked from another .blend file. Blender tracks which properties have been changed in the local file; properties that haven’t been changed in the source can be updated. This preserves the link to the source file while keeping specific edits in the working file.

Instead of duplicating the source, you can work with overrides: local, editable copies of linked data blocks. It’s also possible to create multiple independent overrides from the same linked data—for example, you can edit the same character separately for different uses in a scene. This guide covers preparing an asset hierarchy, creating overrides, editing properties, resetting changes, and resyncing when the source structure changes.

Requirements and file preparation

You’ll need a working file that can be opened in Blender and a data block linked from another file. The sources don’t specify a required Blender version. Menu names are based on the current Blender Manual and may vary by interface version. The sources also don’t mention any account, online service, or special hardware requirements.

Before you begin, check the asset’s data structure. A character, object group, or scene asset often consists of more than a single data block; objects, object data, materials, and other dependencies may all work together. For overrides to work reliably, it’s recommended that the collections an asset needs be placed under the linked and instanced root collection. If the hierarchy isn’t clear, some data may not be overridden correctly automatically.

Library Overrides have replaced the older proxy system. According to the Blender Manual, proxies were deprecated in Blender 3.0 and removed entirely in Blender 3.2. When opening older files, proxies may be converted automatically; complex characters may need manual fixes afterward.

Step by step: Create an override for linked data

1. Find the linked data in the working file. Select the collection or object you linked from the source file in the 3D Viewport or Outliner. If the asset relies on multiple components, consider the related hierarchy as well as the individual object.

2. Select the appropriate root item. Starting with the root collection representing the whole asset, or an appropriate root data block, helps ensure dependencies are handled together. If you need different uses of the same source, remember that each use can be created as a separate override hierarchy.

3. Run the Make command. In the 3D Viewport, go to Object > Library Override > Make. Alternatively, right-click the selected item in the Outliner and choose Library Override > Make. Blender may also create overrides for related data blocks required to establish a valid hierarchy. However, while selected items are made editable by the user, some overrides created to support the hierarchy may not be editable.

4. Edit the properties you need. In many ways, overrides can be edited like local data blocks: you can change properties in editors and perform applicable operations. In the interface, look for the turquoise highlight to see which properties have been overridden locally. In a properties panel, right-clicking a value may offer options to override the entire property or only the selected element of an array-type value. If a property isn’t editable, you may need to use Make Editable first.

5. Reset the change or clear the override. Reset returns the selected override to the original value in the linked source, leaving the override in place and editable. Clear restores the source value and, if the hierarchy allows, removes the override so the linked data is used instead. If that would break the hierarchy, the override may be retained but marked as non-editable. To remove override status from a single property, use Remove Override(s) or Remove Single Override on that property.

Resyncing source changes

When relationships between data blocks change in the source file, the existing override hierarchy may retain the old structure. Blender automatically resyncs when a .blend file is opened, if needed. To troubleshoot or start the process manually, use Library Override > Troubleshoot > Resync in the Outliner.

Resyncing attempts to adapt the linked hierarchy to its new structure while carrying over existing edits. However, some overrides may be deleted when the source hierarchy changes. Check the scene and local changes after resyncing; if the result is unexpected, consider undoing before saving the file.

It’s also possible to link overrides from an external file into another file. The Blender Manual notes that this type of resync can be costly and may run again each time the working file is opened. Keeping source libraries up to date helps reduce the extra work in this workflow. Automatic resyncing can be disabled in Experimental Preferences.

Rigs, animation, and editing limitations

A few rules are particularly important when working with rigs. To add Bone Collections, you must override both the Armature object and the Armature data. Only Bone Collections created in the current .blend file are editable. Collections already in the source armature are read-only; you can change their visibility, but those changes won’t be saved. Collections added through an override are linked to the previous collection by name. Check this relationship when the source collection structure is updated. Bone Collections were introduced in Blender 4.0 to replace armature layers and bone groups.

Whether animation data is editable depends on whether animation was already defined in the source. If the source contains keyframe animation, making changes to existing F-Curves and adding new ones may be limited; assigning a new Action completely replaces the linked keyframe animation. In some cases where the source has no animation data, new drivers can be defined and edited on the override. For NLA strips, options include moving or resizing existing strips and adding local strips.

Edit Mode isn’t supported for overrides. It may also be impossible to edit, reorder, or delete some existing items from linked data. Before using an asset in a production file, test which properties can be changed in a small test file.

What does this mean for architecture and visualization workflows?

For architecture firms, interior designers, and visualization teams working with shared asset libraries, Library Overrides offer a way to make scene-specific changes while preserving the link to the source. Creating multiple independent local overrides for the same linked asset can help manage different uses in separate scenes. However, the system doesn’t mean that every data type and property can be edited freely; the hierarchy and type of data determine what’s possible.

When sharing working files with your team, check that the source library is accessible and up to date, review the collection hierarchy, and verify the results of resyncing. It’s particularly important to test the limits of local changes in assets with rigs and animation. The sources don’t provide information about hardware requirements or usage costs; the main workflow considerations are file structure, compatibility, and the effects of source updates.

Common mistakes

• Selecting just one part and overlooking dependencies: If the collections an asset needs are outside the root hierarchy, some overrides may not be created automatically.

• Assuming every linked property is editable: Edit Mode isn’t supported, and editing source animation is limited.

• Treating Reset and Clear as the same operation: Reset preserves the override; Clear removes the override and returns to linked data when possible.

• Saving without checking the result after resyncing: When the source hierarchy changes, some local overrides may be deleted.

• Leaving the source library out of date for too long: Resyncing with external libraries may require extra processing each time a file is opened.

Next steps

Start with a single linked asset in a small working file that’s easy to recreate. Change a property, then review the results of Reset and Clear separately. Next, change the source hierarchy and check which edits are preserved after Resync. If you’re using a rig, also test overriding the Armature object and Armature data together, as well as the limitations of Bone Collections already present in the source. These checks can help you spot potential losses before moving the workflow to larger scenes.

Sources and license

This guide has been adapted into Turkish based on information in the Blender Manual pages on Library Overrides and Bone Collections. Both pages are published under the CC BY-SA 4.0 license. The Library Overrides overview in the Blender developer documentation was also used for technical explanations.