Board Thread:Naruto Discussions/@comment-4080775-20180410150203/@comment-734582-20180411063937

Princeharris1993 wrote: The Rinnegan and Sharingan came from the Rinne Sharingan line and since the Sharingan can turn into the Rinnegan used right circumstances, it can be said that evolves into a Rinnegan. Sasuke's eye shows clearly that they're different dojutsu. The Sharingan doesn't evolve at all, the eye itself simply turns to a Rinnegan. As shown by Madara, the dojutsu cannot be concurrently active. Only Sasuke can do that, thanks to Hagoromo's intervention.

Activating the MS retains basic sharingan powers. But activating the Rinnegan does not retain MS powers. Madara's clone used Sharingan to put Ay in genjutsu, not his rinnegan.