First, I love the idea of Priss as a Jedi. I think she'd have gotten along very well indeed with Mace Windu, played by Samuel L. Jackson.
Three elements of criticism. The shadows on both moons should match, since presumably they're lighted by the same star.
The lighting for the underside of her cape seems a bit brighter than even the lightsaber's glow would be, and a bit too fully spread. If it's because of light reflected from the ground, then the shadows along the back of her thighs and her back are too deep.
The highlights on her breasts and thigh I think are a little too bright for the base colors of the material.