Board Thread:Versus Debates/@comment-43403813-20190805194702/@comment-43403813-20190808230305

@AsianReaper Kaguya has access to these dimensions through her Rinne-sharingan, we don't know for sure whether her ability of interstellar travel is thanks to her Rinnegan powers, it could be due to one of her other ocular dojutsus or an inherent ability of her own. You could also argue that because Rinnegan is the superior dojutsu to the Sharingan as its evolution, it would allow access to Kamui as it is a Mangekyou ability. Also, the evidence I used regarding Obito's space-time jutsu being very similar to Kaguya's space-time jutsu in my earlier comment can be used to explain how Sasuke summoned Garuda and why Pain should be able to reverse-summon from Kamui. (Trying to enter Kamui and trying to escape Kamui are two different things, Pain wouldn't be able to enter Kamui, but they would be able to escape Kamui.) This is why I think the Rinnegan must have boosted summoning abilities in general, as opposed to it specifically working in Kaguya's dimensions.

By that logic, it makes sense that FTG would not be able to escape Kamui, although there's a slim chance that Obito was not aware of FTG being able to or he overestimated the power of Kamui, this is still kid Obito who is somewhat new to who can exploit his Kamui, but this is merely conjecture.

I've noticed there's a discrepancy between the usage of the summonings as well as between the manga and the anime, the Animal path in the anime uses at least 10 hand signs to summon the centipede, but then proceeds to not use any handsigns at all for the bird, ox and ram, but in the manga she uses none, except for one handsign for the centipede.

^Judging from that, It's safe to assume that the Rinnegan still possesses the ability to summon without blood sacrifices or scrolls, but in terms of hand-seals, it may be either circumstantial or dependent on whether the user decides to use the hand-seals.