I am thinking of a picture in which all that is seen is a fuzzy image - obscured tracing paper. The translucent, or semi-opaque paper prevents the viewer from seeing the finer details of the picture. And perhaps leave a gap between the image and the tracing paper, so the viewer can look at the sharper image if they want to.
Make it more difficult, perhaps, for the viewer to see the clearer image. Placing washes over glass would work perhaps as well as tracing paper.
This is all about questioning what is seen, particularly what people see of other people who are nearby, close...distant...
