Board Thread:Versus Debates/@comment-33229263-20171019104931/@comment-6769189-20171020043640

Rinnegan has Sharingan abilities but it also adds a bunch more powers. And yes you need a Sharingan and Hagoromo's chakra. No one with a Rinnegan did so without having a Sharingan. Also the Rimmegan cannot be shut off. Hagoromo and Sasuke never have theirs deactivated and Madara did it once as an Edo, which did not have his true eyes.

The Sharingan is basically the Rinnegan without 6 Paths chakra. And Hagoromo absorbed the 10 Tails, at some point he had the Rinne Sharigan like Madara did.

Tenseigan is somewhat different from the Rinnegan because instead of devolving from a parent dojutsu, it is evolved by Hamura's 6 Paths chakra, because he was the only one to push it into that state. This implies that Kaguya may have had the potential for a Tenseigan but it was never brought out because the Rinne Sharingan and Shinju already gave her the abilities the Tensaigan would have. I dont know why Hinata didnt get the Tenseigan, but it is possible that the chakra he gave her was not integrated into her like Hagoromo did to Sasuke and Naruto.

Every character has a unique chakra signature. 6 Paths makes different changes to different gentics. It is never explored what would happen if 6 Paths chakra from a different person would cause those same changes though. But dialogue highly implies that 6 Paths chakra from a specific person is needed.