I'm planning to enter the annual contest with a CTF map but I've never made a map of such size and scale before so the idea of creating a 3-stage map is somewhat daunting which is why I'd like to know how some of you have gone-about designing multiple-stage maps. If only to help me form an idea of how to tackle the initial design stage. Do you draw all the stages on paper to begin with? Or do you develop each stage seperately then merge them all together? Do you design with particular buildings and landmarks in mind? Or do you simply create a layout and fit architecture around it?