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GameMastery Guide / Creating a World / Geography / Terrain Hierarchy

Breaking the Rules

Source GameMastery Guide pg. 147
While these guidelines stress the importance of realism, don’t forget that you’re designing a fantasy world! Anything goes—feel free to have rivers flowing uphill, mountains that float on the ocean, deserts or forests that move, or swaths of ocean where the water drops away to expose portions of the sea bed. As long as you realize that these locations are unrealistic, you can design for them and explain them however you wish.