Droste pictures

I learned about Droste pictures after looking at one of M C Escher's works, namely Print Gallery (below). It's a grid that he's built a picture on top of, (the grid is shown below the picture). If you follow the picture he's looking at around clockwise, you end up looking at the roof of the gallery he's standing in.

Droste is the name of a brand of cocoa that employed the use of "echoing" the picture into itself (see below).

There's a guy called Josh Sommers on FLIKR (click here) who provided a tutorial on how to make your own Droste pictures. I used it to make the following pictures!