The client wanted a cover that fitted with her previous novels. It should picture the main character in a pink or golden dress that was short in front and long in the back.

I rendered the model's body, including wings, in Daz 3D and added the head of the woman that the author used images of in her previous book covers. I tried my best to match the body's lighting with that of the woman's head to make her look realistic. A whole bunch of painting was also required to add shadow from her hair that was partially taken from stock images, too.
Long, flowy fabrics were added to the model's dress and bent where I wanted them to flow to.
The character should have silver rune tattoos on her arms and palms. I added two magical rune symbols above her hands to show off magical abilities.
To add more drama, there are loose feathers flowing in the wind towards the viewer which also create more depth.