Night picture is not only the color of the picture darkened, need to be based on the tone of the material picture selection of a good visual center, and then in the sky part plus some starlight and moonlight and so on. Later, the appropriate rendering of color and details can be.
1. First open the background material shown in the figure below.
2, copy a layer, bring up mask mask, window > mask, click the icon in the red box, add pixel mask.
3, click the Color Range button, with a straw hold SHIFT key to select, the effect is as follows.