I am wondering what value people feel that worldbuilding has in RPG games and some of the effective (and ineffective) ways people have experienced it being implemented. I am sure that part of the reason certain worlds are so popular (like Dune, Lord of The Rings, Game of Thrones, The Elder Scrolls) is because the creators put a huge amount of effort into making comprehensive, breathing, organic worlds where emergent stories can take place.
I am trying to capture a little piece of this magic for my RPG. Some of the ways I am experimenting with this is commissioning a short comic book or two that have self-contained stories set in the fictional world that are separate from the main game story. I am also writing the story of the game as a novel, and creating a kind of encyclopedia of the monsters in the world (these items can also be given away as high tier Kickstarter rewards). Although these projects are very costly in terms of time and money.
What are some less intensive ways you might suggest to create a more immersive world and qualities to aim for and avoid?
If this topic belongs in Writing For Games then I apologize for the mistake.