Minecraft Mod Showcase: GENERATE OLD TERRAIN IN 1.16.5! (Modern Beta Mod) - YouTube
Omen Map Editor [Minecraft: Java Edition] [Modding Tools]
Omen map editor file - Minecraft - Indie DB
Indev Hell | MCreator
Turns out that the noise generator used in the Beta+ mod for 1.12.2 is on the nose for actual beta world generation. As seen here: the panorama seed. : r/GoldenAgeMinecraft
Spzi's Classic Pack - Technic Platform
Indev Worlds (Compatible with any MC Version) - Maps - Mapping and Modding: Java Edition - Minecraft Forum - Minecraft Forum