Board Thread:Naruto Discussions/@comment-25051328-20140818021248/@comment-25051328-20140818161017

Ah, that makes sense, I figured he was just more adept with amaterasu than Itachi was and could apply shape transformation to it, not that it was a separate jutsu,and that he was much worse at tsukuyomi than Itachi was so didn't use it as it wasn't as effective. Thank you for clearing that up!