Shine a Light on the Subject
In lighting sometimes you want something to appear as if it’s being lit from a single source. A linear gradient overlay can do this but it gives a uniform look to the object. Simply switching the gradient from linear to radial focuses the light in a particular area. If you’d like the object to look like it’s being lit from a direction, click on the object while the gradient overlay palette is still open. You can move around the gradient focus to your whim. Increasing the scale of the gradient helps the effect as well.