Board Thread:Theories and Speculation/@comment-9782468-20160223232833/@comment-27660682-20160226064249

All genjustu is precoded to an extent. For example, the sage art frog song was coded to make the pains see themselved in a frog prison with jiraiya standing outside of it when in reality they were all on the floor with jiriaya standing near them. For genjustu occuring in real time, the user is able to make changes to the illusion. As itachi made naruto see shurikens that werent actually there and itachi was talking in the genjustu as naruto perceived, but in real life he wasnt. I understand what you are saying, but then by that logic there would be several itachi's in real life, and with swords while kakashi is on the cross. Remember genjustu doesn't teleport you or the caster to another world, simply an illusion.