Board Thread:Questions and Answers/@comment-24.62.160.166-20140526162238/@comment-26287951-20150416154604

I dont think they made him invisible, just that he is extremely hard to see due to his colour when layered over gamma and the ligting of the meta. Also it is only on screen for a few seconds and he isnt one of the more important A.I so they probably just let it be...