Board Thread:Theories and Speculation/@comment-27821284-20160218112823/@comment-26369387-20160222143401

^Except Sasuke got Rinnegan through Hagoromo's chakra. Hashirama's cells may have strenghten it, but it was still Hagoromo that gave Sasuke Rinnegan.

Also, I don't think it was ever stated in the movie or Retsu no Sho that "flesh" of Ōtsutsuki was required.