Unity3D: Learn which layers are not being used in your project.
What he does?
Check the unused layers, you can choose to search for unused tags in the scene (active objects only) or in the project (prefabs).
Options?
-Search only on scene or project. -Create or not a .txt file with the layers. -Show or not the standard Unity layers.
How to use?
Just play on any object and give play, just be sure to disable or remove the script from the object after the check, depending on how many objects you have in the scene or the project can mess up.