totally going off of what irish said. Whatever your mind creates for you in your dream world is what is going to be there. You have to have a great grasp on reality in the waking world to have a totally clear picture in your dream world. If you think in your head right now about a certain place and recall as many details as you can, that is what is going to come out in your dream. If something is fuzzy in your dream, you might try checking in out in your waking state to make it more clear in your next dream. It would be a pretty fun project. See how realistic you can make your dream world. Seems like it would be a great way to expand your imagination.