the flash movie looks pretty good to me. a few glitches, but nothing you don't know about already. the shadows under the chin to which you refer are not shadows, but actually areas that aren't receiving any illumination. there are many ways to do what you want, and the lighting experts will be able to tell you more. one way is to use several lights from all angles, to make certain every body part is lit up. GI may also work, but if there's ambient occlusion, you'll get those dark areas.