I've been working on some new images for some screenprints next week, and using  some fairly well-known but cool techniques for adding some randomness to digital images.  It involves converting the picture into a raw format which can then be opened as a sound and subjected to the usual effects that you might use if you were making music, such as echo or, in the case of the image above, reversing sections.  The raw file is then saved and opened again as an image.  There are so many possible outcomes, it's quite bewildering.  You can do