Erasing Alpha does not erase the Mesh in Texture Paint? I started texture painting this object. I came across the brush tool "Erase Alpha". So i started removing some of the mesh (at least thats what i thought) in solid view.




But when i go into rendered mode, it doesn't actually erase any of the mesh, it just turns it black. I thought that if it really did erase the mesh, i could have got the "ripped" cloth look i was looking for without remodeling the mesh. I guess there is no way to actually erase the mesh as easy as that? 

I know there are better ways to create cloth, but its a low poly mesh so yeh. Any ideas?
In eevee you have to select the material and enable "Alpha something" as blend mode in the settings.