I have been tring to make a world that has large epic mountains but normal plains / oceans / deserts and other biomes. But everything i do effects all biomes and some biomes were completely removed. There a way to get what i'm loking for?
Try increasing "Biome Scale Weight" to somewhere between 2 and 3 (I prefer it at 2.5). As far as I can tell from my limited experiments, it multiplies the height of hills that are already there. So hilly terrain will get way higher, but flat terrain will not be affected.