Juubi Jin patterns

[Devauzamaki]

I know naruto basically juubi Jin now. And it's still not confirmed if hagaromo got rinnegan before or after sealing juubi.
Anyway every juubi Jin we had so far has had at least one rinnegan in their eye sockets.
Hagaromo
Obito
Madara

It's way to consistent. I believe juubi chakra morphs your eye. Even though the first two were stolen.

 

[Seventh Sama]

I believe that as well.... Prolong exposure to its chakra must've altered hagormo's body...(i.e sage's body, sage's eyes..)