All my previous digital colour pictures have been created by tinting black and white artwork (pencil or pen & ink), sometimes adding digital 'paint' over the top to augment the picture. This is my first picture that is 'painted' digitally from scratch. There is still a pen & ink drawing underneath but except for a few stray pixels around the edges (and the signature) it is completely obscured by the colour on top.
The gas mask in the image is inspired by an exhibit of a WWII era gas mask in the Winston Churchill's Britain At War Experience (Tooley St. London). The single floating eye is well.. a motif I use often.