Difficulty recreating Minecraft Alpha/Beta terrain generation

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NostalgiaGen 0.6 - Generate Minecraft Alpha/Beta worlds on your Sponge/Forge server - Plugin Releases - Sponge Forums

Beta+, Generate Accurate Beta and Alpha Terrain with modern features! - Minecraft Mods - Mapping and Modding: Java Edition - Minecraft Forum - Minecraft Forum

Minecraft Alpha Generation And interesting options ;) - Suggestions - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum

How to Download and Install Minecraft 1.9 Version 3 Pre-Release « Minecraft :: WonderHowTo

Minecraft (Hexxit) – The Curse of the Albatross – Chapter 1 – Why I Game

Beta+, Generate Accurate Beta and Alpha Terrain with modern features! - Minecraft Mods - Mapping and Modding: Java Edition - Minecraft Forum - Minecraft Forum

This Mod COMBINES New and Old Minecraft!

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Difficulty recreating Minecraft Alpha/Beta terrain generation - Scripting Support - Developer Forum