That's it! this mod changes world generation by making biomes slightly flatter, ideal for huge projects like cities, zoos, ranchs, fields, etc. Besides that, the world doesn't lose its beauty, beautiful mountains stay intact and very tall, as well as rivers.
it is also compatible with lots of worldgen mods, such as William Wythers' Overhauled Overworld, Expanded Ecosphere, Regions Unexplored and probably lots of non-tested mods and datapacks.