For me it unlinks the hierachy of any collection that doesn’t have an object in it, even if the subcollections do.
This makes all the objects and collections orphan data and if you close blender, they will be permanently deleted.
For me it unlinks the hierachy of any collection that doesn’t have an object in it, even if the subcollections do.
This makes all the objects and collections orphan data and if you close blender, they will be permanently deleted.