If you're going for a 2D anime style, you can kinda get away with simple lighting on the face, so I adjusted it with just a small shadow on the nose. The shadow on the hair is done with a multiply layer, and you can erase the parts that will be hit by light. You can visualise the hair as ribbons with the top side being hit by light and the other side under shadow. I added a slight shadow to the torso and lower legs because they're a bit bent so they wont get fully hit by the light. | Artwod Feedback