Board Thread:Theories and Speculation/@comment-35448581-20160502192848/@comment-25122992-20160502200616

Lol, technically, all doujutsus we know are mutations, one way or another, happening throughout the Ootsutsuki bloodline and all their relatives under the influence of Shinju fruit and the chakra it gave them. And since all known Byakugan users possess chakra and technially are shinobi, there's no evidence it's somehow exceptional. It's odd to think that Byakugan dojutsu is something special that isn't connected with all chakra-related dojutsus, so these eyes were clearly affected and influenced by chakra, if not created by it.

Regarding Tenseigan, it seems you've misunderstood the requirements for it's awakening. Although I have to admit that Tenseigan Energy Vessel is somehow connected to the Tenseigan doujutsu, since the former's core is Hamura's Tenseigan eye, yet these are two different things. Energy Vessel doesn't influence Tenseigan's awakening in the eyes. What the user needs are "pure" Hyuga Byakugan, Ootsuki's natural chakra (especially since he's an Ootsutsuki himself) and just some time for the complete awakening. No need of Energy Vessel, chakra within it whatsoever.