Original artwork. Gouache (all the colours) and ink (mostly the black bits) on A3 size watercolour paper. Took some photos with my (old, cheap) phone. Lost the vividness of the original picture, so I had to spend a couple days “GIMP-ing” them. (The GIMP is the GNU Image Manipulation Program, an open source software.) The (copyrighted) image below is the least disappointing of those efforts!
Dooliganism 