These were made by taking large (800x600 path cells) random multicursal mazes and spectrum flood-filling them with the output wall width set to zero so the result is purely the path. This hid their maze origins leaving them looking like abstract artworks. I then reduced the images to 50% (in both dimensions) which (as well as saving bandwidth) hides the maze structure further by discarding every other row & column.
I used John Lauro's online CGI maze generator Maze Maker to generate the maze templates. See the Mazes page for more information.
For more, go up to the Rainbow Labyrinth Gallery home page.