Ok, because of the nature of installation I had better first explain the context of the room in shich we do installations. Its a small room near our studio, with a projector and a screen to project on, and usually chairs. Other than that the room is basically empty, but with some awkward corners and shapes.
For my piece I first thought about using photography to create a window in the space, to the outside(by quite literally taking photographs from the other side of the wall looking out, and then placing the image on the wall inside the room, where a window might be, but isnt).
My second idea was to photograph the screen itself, roll it up, and place the image of the screen on the wall that was behind it. The wall becomes the screen, and the image becomes the frame of the screen. Then, because the wall is white, it is possible to continue using the projector, but on the wall.
Instead I used the door of the room. It has a long, slim glass window in it, with a wire grid embedded in the glass. It usually has black paper blocking out the view and light both in and out of the room. I took pictures through the glass of the room with the lights on inside, and a figure could be made out sitting inside. Then I had the door locked. The idea was it looked like the presentation of the installation had already started inside. In fact, the lights were off inside and noone was in there.
At first I really wasnt at all happy with it, but I found later that as I was walking past it it always caught my attention, as it always convinced me there was something happening in the room!
What I liked most about it was that my piece replaced the black paper, being both effective and interesting.
During the presentation the most important idea that came up was the possility of employing illusion in my practice. I hadn't even realised I had started using illusory techniques, yet what is photography if its not an illusion?!!! At the time I resisted the idea of using illusion, now Im dekighted to be using it.