i generally make a second layer in photoshop, and paint in highlights with a white airbrush. then i use the eraser tool with a soft airbrush set at low opacity to fade the highlights. gaussian blur on the highlight layer works well too. you can build up highlight layers if you want better results, just keep repeating this process over and over. my gladiator image had about 8-10 highlight and blood/shadow layers. if you build them up, rather than having them all on one layer, then you can click them on and off (visible and invisible) and see exactly how they affect the image. you can also edit different parts of it without damaging previous work. cheers, -gabriel