Photoshop

Set a global lighting angle for all layers

Using global light gives the appearance of a common light source shining on the image.

Do one of the following:

Choose Layer > Layer Style > Global Light. In the Global Light dialog box, enter a value or drag the angle radius to set the angle and altitude, and click OK.
In the Layer Style dialog box for Drop Shadow, Inner Shadow, or Bevel, select Use Global Light. For Angle, enter a value or drag the slider, and click OK.

The global lighting applies to each layer effect that uses the global lighting angle.