Procedural Sky is a type of map background and can be selected from the Map Properties panel. Its purpose is to provide a quick and convenient way of adding a simple sky to the background of first-person games or cutscenes. The sky is generated from a set of values configured in the settings dialog, specifically the colors of the sky, ground, and sun. The reset button to the left of the help button will set all of the options to their built-in default values.