I wanted to see what would happen if I superimposed a regular, studied sketch on a blind drawing of the same portrait subject. I used a photograph of my father as the model on which to experiment. My choice of subject holds emotional content, as my dad passed away a while ago and I still miss him.
I drew the inked outline first, without looking at the drawing paper. After that I did a careful pencil sketch of my dad, checking frequently between the reference photo and the drawing surface. It was a little difficult to ignore the overlying ink portrait.
I haven’t come to any conclusions about the relationship between the ‘unconscious’ (blind-drawn) figure and the carefully drawn portrait. However, as a viewer, I only see the ink drawing or the watercolor sketch; I can’t see them both at the same time, or even a merging of the two into a third, coherent image.