Okay. No photoshop. This is going to be a real live drawing.
Two large sheets of Fabriano 300 with a brush and Encere Sennelier walnut stain ink. Then colored Higgins waterproof ink which does this cool blue/brown thing with water. I added solid acrylic to the sky and put a wash of titanium white acrylic over the girls to give the girls a more uniform feel.