A live image of the frame and the visitors surrounding it is projected onto a screen behind the frame. As visitors approach the frame they will notice that they are pictured in color when standing behind the frame. And that they are sketched when standing besides the frame. When sticking their hand through te frame they will discover that their hand is sketched also. What happens then is up to the visitors.
The idea of a portal between a real and alternative worlds intrigues me. It provides a very natural way for seamlessly transitioning between differents worlds. And that without having to put on a virtual or augmented reality headset.