Board Thread:Naruto Discussions/@comment-25051328-20140818021248

"Danzō Shimura stated that Sasuke's genjutsu is incapable of altering the victim's perception of time, and thus is vastly inferior to Itachi's Tsukuyomi." (Reference- Naruto ch. 478 p. 3)

Could Sasuke further his training in tsukuyomi to further advance the effectiveness and make it as good as Itachi's, or is it set in stone that he can't alter the victim's perception of time?  