Emily's Finished Portrait
The wonderful thing about acrylic paints is that it's so easy to paint over other layers when making adjustments. A drying time of 20 minutes or so is all that's needed. I applied a shaded lighter blue to the whole background.
Emily needed some final adjustments to improve the likeness. Because I changed the shoulder pose of the original photo, I had to look at some sitting poses of Emily to get her neck and shoulders right. I slimmed down her neck and defined her shoulders by painting over the edges with the blue background paint. Next, I touched up the edges of her shoulders to make them darker and more three-dimensional. Here's Emily's finished portrait: