Nothing is darker than a black hole. They can never be seen: it's the movements of stars around them that reveal them.
Our work represent a starfield. This field is influenced by the pictures coming from a wecam, so the viewer can play with it by moving around -- for example, at some points, they can see their own face represented by the stars, but when they try to take a picture of it the stars will move away escaping from the light. Each little star will change its size and motion based on the "hidden image" thus contributing to revealing it indirectly. Something does not need to emit light to be recognized.