Minecraft wiki entry for Seed_(level_generation), associated text: In Bedrock Edition, the 0.9.0 update was the first update to overhaul world generation. Oceans were changed in the Update Aquatic. Villages and other structures were changed in Village & Pillage. 1.17.0 changed the location algorithm for some structures such as dungeons. World generation is overhauled in 1.18.0, becoming the second update to overhaul the world generation entirely, with the addition of bigger caves, biomes in caves, new mountains, and changes in terrain height.