Board Thread:Naruto Discussions/@comment-25626003-20150728002625/@comment-5547501-20150912011537

I think Obito not going intangible could be something like 'the Ten Tails power is too potent to be split between dimensions'. This would explain how Madara could use Kamui to jump from one dimension to the next but Obito couldn't use it to phase as he would basically be splitting himself (and thus the Ten Tails) across two dimensions.