An override on a prefabAn asset type that allows you to store a GameObject complete with components and properties. The prefab acts as a template from which you can create new object instances in the scene. More info
See in Glossary might become unused in the following situations:
FormerlySerializedAsAttribute
.Unity stores the unused override data in the sceneA Scene contains the environments and menus of your game. Think of each unique Scene file as a unique level. In each Scene, you place your environments, obstacles, and decorations, essentially designing and building your game in pieces. More info
See in Glossary file, which means that if you restore the deleted script or field definition, Unity reapplies the override data. Unity doesn’t automatically clean up unused data because you might have moved the object or property the data refers to temporarily or in error. It’s best practice to clean up unused override data to ensure that scene files only contain relevant data, which makes version controlA system for managing file changes. You can use Unity in conjunction with most common version control tools, including Perforce, Git, Mercurial and PlasticSCM. More info
See in Glossary and collaboration easier.
To check for and remove unused overrides, perform the following steps:
Unity writes details of the removed overrides to the Editor log.
You can also remove unused overrides from the Hierarchy:
A dialog appears to confirm the removal of the overrides.