Well it's like a normal stencil that you would use with spray paint except you use light (a camera flash) instead of paint. What you do is you set up a camera to take the photo with a long exposure (like 15 seconds). You set off this camera then run in to the shot and fire a flash from another camera (or wireless flash) behind the stencil through a pyramid shaped rig painted black and with tinfoil on the inside attached to the back of the stencil (which is also painted black) facing back towards the camera taking the photo. Once you've done that run back out of shot so you don't appear in the photo.
That's really awesome This light stencil thing is really interesting! I'd like to know more about it so I can try it myself when I get a new camera (mine was stolen). Is there anywhere I can go to read up about it?
Yea basically the stencil is attached to a pyramid shaped box with tinfoil on the inside and a flash from another camera (or a wireless flash) is fired inside this box facing towards the camera that is taking the photo. The camera taking the photo is set to a long exposure (in this case it was 15 secs) and the stencil is quickly moved into position, the flash is fired and then the stencil is quickly moved out of the picture. The box and the card the stencil is cut from doesn't show up in the photo because it's painted black and I don't show up either as long as I'm quick enough.
well I came up with my own method for the colours. What I did was print the image off then brush the paper with cooking oil (to make it transparent). I then attached it to a stencil cut out in the shape of him. I realised that the colours weren't that bright so I printed another copy of him, brushed it with oil and lined it up with the other one.