Fixed a bug where adding the camera first would prevent selecting it in the screen. Thank you @CheesyFX !
Added a new material/shader screenglitch01
Side notes:
I'm gonna add new shaders in the future, add an "offline mode" for the screen (which would be some kind of black screen with a big "offline" word).
I'm thinking of a way to handle the performances better when the camera are not in use. Either dynamically or by trigger so that you can disable completely a camera while the player is looking at another through the screen and keep good performances... it could help having scenes with dozens of cameras without killing your PC : D
