Alas! My 2D/3D self portrait was not dry enough to allow the necessary layering before the RBSA competition deadline, so I must revisit the picture at a later and more leisurely time.
I am now glazing the art of painting picture, which, because it features a self-portrait at its heart, I may just enter into the RBSA competition itself. The Art of Painting is perhaps too bold a title though, so I might rename it.