As a child they used to burn the stubble and in the evening you would see lines of stuttering embers forming a horizon… it may come from that.
Or it may just come from trying to make a primitive metaphor of a sunset. Indisputably in my memory it has to do with illustrating the line of a horizon. So the initial photographs really had to do with decorating a sundown and at that point I didn’t believe that you could use paint to convey fire.
Later I changed my mind and made paint work as photography was completely inept at conveying my aims