So theres a server that i play on alot, and id like to practice on its map. its a kinda big map, i tried the minecraft world downloader mod that requires you to walk around and load what you want to be downloaded. the only problem is that without speed 9999999 this would take forever. im looking for a tool that downloads the entire world at once.
Not possible to download the entire world at once with a mod. The server admins would have to have a world download set up.
With a mod the most optimal scenario would require you to have access to a teleport command. If you did, and knew the bounds of the world, you could have it teleport you to a location, wait until all the chunks nearby were sent to your client and saved, then have it teleport you to another location until the entirety of the world within the bounds were received and saved.
I don't think there are any mods that do this, although I may be wrong. You could combine the world downloader mod with a command block apparatus to do this, but that would require you to have op as well.