When Madara absorbed the other half of the transmigrant, Hashirama, he only took some of his cells and it made a graft in his chest. This not only gave him his complete ocular powers, but also Wood style. But if it were in reverse and Hashirama absorbed Madara's cells, would he only have to do the same thing to gain ocular powers, including rinnegan, or would he have to completely transfer eyes?