Not asking when. I see the million other posts about it. My question involves moving stuff from a 1.7.3 world to a 1.9 world. The players on my server have created a huge area of buildings above ground encompassing some 300x500 area and some great underground structures and redstone machines, etc. Can you take an enormous chunk of one world and move it to another with say WorldEdit, i.e. from a 1.7.3 world to a 1.9. Will chunks which have not yet been created in the 1.7.3 world, but when updated to 1.9, will new generated chunks use the new biome algos? Would I be better off just starting fresh? I'd prefer not to since the current seed is very good even with 1.7.3 Amazing hills mountains and cliffs, overhangs, pandora like floating hills, tons of clay and resources, sheets of ice overhanging areas on huge bodies of frozen bodies of water, etc, but if its necessary to start over, its necessary. Thank you for your responses and the continued development of bukkit and its plugins.