Yes thanks to @tbrk I realized that! I was too zoomed in when I did that part and so puting to much details there, I'm currently correcting that, there probably will be blur, that would make sense since the foreground character is blurred
I was thinking about that too, but I'm afraid it draws too much attention in an uninteresting part of the piece, but I don't kow yet, I still have to try it, we'll see!