Intergrammatical
In my Hypertext 2000 paper, I discussed "intergrammatical" hypertexts that use overlaid, translucent elements for montage and collage. Here, from the Pergamon Museum in Berlin, is one of the oldest such hypertexts.
I don't know what the text says, unfortunately, but notice how it plays off the underlying image. The image doesn't illustrate the text, the text doesn't document the image, but the two combine to say something that neither, alone, could say.