The tutorial process is very simple, but the author is more about how the picture is actually different ideas. Here to use the night effect, with color and landscaping a little different, need to be in a specific environment, such as the color of the picture rendering.
< small map view big picture >
1, to start the imagination in mind space, adjust the color of blue, dark environment.
2, add sky level, pressure dark sky and environment make it night effect.