I'm having serious problems with deciding whether this would be a good idea. Think of it being similar to that book 'Outlander' where you have a world that is kind of medieval fantasy, but you have some other race which is technologically advanced. I'm not sure if I should go along with this, or just make it all fantasy. The reason is that I have one character who has been raised among these technologically advanced ones while others are part of the original inhabitants (the one among the technologically advanced ones is related to a character who is part of the original inhabitants.) I'm wondering if I should go along with it, or just save myself the headache and make it all fantasy. It wouldn't be hard to make it full fantasy because I haven't really written anything, it's mostly been done in my head. I really don't want to get halfway through only to decide it's a bad idea. What do you guys think?