The key to great world-building per science fiction and fantasy author Chrome Oxide, is to create a story and setting that are believable. For example, you can't have your main character taking public transit in the modern day city of Los Angeles, and then arriving somewhere in just five minutes. Heavy traffic wouldn't allow that.There are world-building software and platforms that can help you, he says, but sometimes all of the details they offer are too much. Instead, Chrome follows the just-in-time world building method. He adds in the fine details only as they are needed, so that he's not including a bunch of unnecessary details that can overwhelm readers.