they can take out the "藍屏" use another color or mount it with other back ground,藍屏 can also be green or red,mostly.

in other words, if you're using 藍屏,and you're wearing a blue T-shirt, then part of your body is disappeared, we can only see your head,arms and legs, so when ever you're using this skill, never wear the clothes that match the 藍屏,otherwise OOPS!