Board Thread:Versus Debates/@comment-33229263-20171019104931/@comment-6769189-20171020090514

Sasuke casted Genjutsu: Rinnegan on all the tailed beasts didnt he??

It was also stated that the user can master any jutsu, which sounds like an extension on Sharingan copying any justu, but these mechanics and abilities were ever really explored, so that is conjecture.

I believe that the Uchiha eye holds the genetic potential for the Rinnegan and the Sharingan, they just need 6 Paths/Hagoromo's chakra. This would explain why Naruto never got a Rinnegan and Sasuke/Madara never got 6 Paths Sage abilities, despite all of them having Hagoromo's chakra but none of the effects of the opposite bloodline.