In a standalone game, changing graphic settings to Low will remove the simulated sky and replace it with an empty sky. If I change the setting back to High the sky will remain the empty sky. This destroys the ambience of an outdoor level.
Additional Enhancement Request:
Remove the graphics preset options in standalone games and replace it with more in-depth options similar to what we use in the level editor. This way, players can pick and choose what options to edit without destroying the original atmosphere of the game.