Acrylic
This is a mural I've been working on in dribs and drabs for a very long time indeed; I don't recall exactly when I started it, but I suppose it's been underway for something on the order of twelve years. It's finally in a state which could be described as finished, though there are a few little additions I still have in mind for the next twelve years.
The thumbnails below link to some close-ups, which will open in a new window.