I used three distantlights to illuminate the scene for two reasons. The first was to keep it simple and the other to speed up render time.
You will need to create three distantlights, set them as seen in the image here. The numbers shown represents the light density, and all were set to white, but you may wish to change them later to suit the result you want.
Next position them to face the model at the angles shown, there is no need for accuracy.
Now set all the light sources to DeepShadow, this will display only the areas that are visible to the light. The last thing you would want to see in your photo is the light shining from a hidden area which should have been shaded, such as the back of the neck.