Add the ability to switch to another world to a particular world's view, and when switching smoothly move players that exist in both worlds to their location in the new world. Players that do not exist in the new world should fade out and players that only exist in the new world should fade in.
Add the ability to switch to another world to a particular world's view, and when switching smoothly move players that exist in both worlds to their location in the new world. Players that do not exist in the new world should fade out and players that only exist in the new world should fade in.