The Vedantins do not say that the world is unreal. That is a misunderstanding. If they did, what would be the meaning of the Vedantic text: ‘All this is Brahman’? They only mean that the world is unreal as world but real as Self. If you regard the world as non-self, it is not real. Everything, whether you call it illusion (Maya) or Divine Play (Lila) or Energy (Shakti) must be within the Self and not apart from it.