Guinevere stands defiant with her long blonde hair streaming around her. She's looking straight at us. She stands in some ruins and the floor is composed of stones arranged around a perfect circle. Her feet touch the centre of this and she looks poised about to make a statement or even cast a spell!
The sky looks dark and threatening on her left, but the sun is just rising on her right.

This is a closer view of Guinevere. I've added a sky and background which I made using Bryce 3D. This sky has more yellow and green tones and looks less stormy. I've made the whole scene lighter and brighter.