I've played single player with 256, even at default ram settings the loading times and memory usage was pretty much same as normal
now 512 and 1028... <_<; lets just say it gets uuuugly lol. Although the terrain generation is pretty epic, and the lag isn't bad at all once you actually generate the terrain. It's mainly the first time you generate it, oh god does it lag. like whoabad.
I know there's a cubic chunks mod that supposedly gets around this by making the chunks load in 17x17x17 cubes instead of columns, if that helps. I know the height of that mod can get pretty damn epic, like 64,000 or something blocks tall lol.
XI Wiki


