The Tile mode

This is the mode by default. It presents your favorite albums in a random order, nicely tiled up:-

The number of albums shown is calculated from the canvas size and the album size. You'll probably spot some covers appearing twice in the same image if your profile doesn't contains enough covers.
There are a couple of parameters you can tweak for your own amusement:

Album Size

You can change the default the album size of 130 pixels (covers are square) using the '-a' or '--AlbumSize'. The smaller the more tiles can fit on the image. Ex.: ./wallpaperfm.py -a 100

Interspace

The interspace is the space between each cover. The default is 5 pixels, you can change it with '-s' or '--interspace'. Ex. ./wallpaperfm.py -s 10