This was done as a birthday gift for a friend. I did it all in Photoshop on my Cintiq. Originally, I was gonna do it black and white as you can see in the first version. But later decided to add color. I just colored over the grey values I had already created, I hear Tim Sale does something similar, since he is color blind. Anyway, I may explore this technique more in the future, as I like working in grey more than color anyway.