I’m sorry, but you are quite inexperienced then. I don’t know how I stumbled upon this post (I guess since I am a UE4 dev) but this is EXTREMELY wrong. Though I don’t know how to do it to Fortnite (nor do I really care), what I can say is that programs like Photoshop and Illustrator even have this option… So I don’t know what you mean when you’ve never seen it.