JustASimpleTimeTraveller

To satisfy my growing megalomania, I desire mountains higher than the vanilla world height limit. I have looked through the official forum, several discord servers, the game config files and even some subreddits, but have found only the 1024 build height mentioned a handful of times, however nothing about how to achieve it. There is documentation on how to change the scale of landforms relative to the build height, but I couldn't find anything so far on modifying the world generation settings above the vanilla limits. Is there something I've missed, or is it just impossible?