Scene Layers is an Editor Extension for Unity 3D. It assists in group style organization in the scene hierarchy and provides additional functionality through the inspector window. As Unity does not have basic grouping or layering functionality seen in other engines (Unity Layers are physics and rendering, with a 32 layer limit), it is common to group game objects using another game object. This works fine so long as the parent game object’s transform is not modified.
Scene Layers expands on this method of grouping and adds ease of visibility and functionality to the hierarchy and inspector. Scene Layers are light and can be used in the editor and its features can be used at runtime if needed. Scene layers is an answer to basic game engine editor functionality that should exist by default, but does not; as such, Scene Layers and included tools and tech are Free Open Source Software