Board Thread:Naruto Discussions/@comment-36221354-20180717114536/@comment-32685487-20180717214045

Rinnegan is a product of the chakra of those who naturally posess it.. in most cases you only need A DOJUTSU apparently, as Momo had Byakugan and so did Urashiki. Naruto being gifted half of Hag's chakra and not awakening Rinnegan is either because of plot, or because he did not have a Dojutsu.