Night and day

I thought just as a new idea for the interface of the game that there could be a night and day thing where as a "day", which would really only be a few hours or something, could be shown as the shadows of the buildings' could move and elogate as the day went on, and as for night, the moon would be out and have the same effects on the buildings' shadows as the night went on. Also, it'd be cool if torches could actually give off light to surrounding areas during night. Also, make it so where you can still see clearly during the night.