It's all about making the world seem real. I tend to use real places, like this picture I took in the Smoky Mountains National Park. But, a created world has to have a history, a mythology, a culture---all those things we take for granted.

Sometimes there's nothing more difficult for a writer than creating the world of the story. It is a long, drawn-out process. When I was writing Darkshifters, I didn't name a single town or region until well into the second book. However, I knew the history of each place. I knew the mythology. I knew the cultural aspects of the different racial groups of the world. It's that kind of detail that gives a world depth--even if only the writer knows those details. In Asphodel, on the other hand, it was the direct opposite.

I am a firm believer in starting with a map. The map not only tells you where you are, but where you're going...always important in epic fantasy. Besides, look at all the places you get to explore as you write! Each different city or country has its own customs and quirks--what fun! For example, although Ansienne and Tartarus are neighbors, the two kingdoms have lived in uneasy truce for a long time. When the monarchy trembles in Ansienne, it's only natural for the Tartaran King to eye the borders with speculation. After all, Tartarus is mostly mountainous. It relies upon the agricultural trade of Ansienne's rich fields to feed its people. What self-respecting King wouldn't look to increase his kingdom--and the kingdom's natural resources-- by means of conquest?
See what I mean? It's easier to develop the specific personalities of place when you start with a really good idea of what the place LOOKS like.
A word of advice. Most rivers don't start in plains and they don't roll uphill. Rivers go from high point to low point i.e.--mountains to oceans. I'd hate for you to look silly and draw in a river that defies the law of gravity.
When you're developing your countries, be sure you give a thought to the racial makeup of its people. (I shouldn't have to tell you that the hotter the climate the darker the inhabitants, right?) Think about their culture--are they democratic and capitalistic, or is this a monarchy with an extremely wealthy upper class?

And don't forget--there are other races as well. In Asphodel, I use a lot of the classical races from Greco-Roman mythology: centaurs, Hippolytes (Amazons), harpies, minotaurs-anything that could be fun and interesting. It is a standby in fantasy writing to use the mythologies of our history as a jumping-off point for world development. Just so you know, the world of Asphodel has elements from Celtic, Greco-Roman, Norse, Mesopotamian and Egyptain mythologies. It makes for a complicated and diverse world.
And gives me lots of great critters to fight.

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