To do this I used a projector to project the image on top of real people's faces, the result was successful and I chose to further study these in my sketchbooks.
A critique of these photographs, for me, is that they haven't come out in a photograph in the same effective way that they were in person. The texture is quite flat and too indistinct on the face to be a recognisable texture.
An idea to combat this is to make the texture smaller on the projection - to cover only the face, I could also play around with the settings on the camera to increase the effectiveness.
