Cleanup
Cleanup action is an action to help keep the rig file as clean as possible. It validates the current state of the scene with checked items and tries to fix those issues automatically.
Unknown nodes: Deletes any unknown nodes in the scene, usually caused by missing plugins
Blind Data: Deletes the blind data nodes which is frequently comes from the game assets
Unused Shading Nodes: Prunes the scene from unused shaders
Display Layers: Deletes all display layers
Animation Layers: Deletes all animation layers
Merge Similar File Nodes: If two or more file nodes share the same file input, it keeps only the first one and makes re-connections.
Merge Similar Shaders: If two or more shaders are identical, uses only first one and makes re-connections.