Ackster used as much effort and force of will to immerse himself in his image training. His mind was the world that existed, and thus, the world that existed was his mind. What happened in his mind happened in the world, and his mind would mirror what happened in the world.
Ackster wasn't even clear-headed or lucid enough to realize what was happening with his thoughts or that he was as good as temporarily deranged.
In the process of withdrawing his Spirit stat and funneling his mental will, Ackster ended up hyper-focusing on his image training to the point of forgetting who he was. He had done similar things and reached similar states before, such as the time when he let his body's instincts take over when he realized his martial arts.
