Uploaded February 2021 | Updated September 2026, 2 hours ago

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You've probably played in a Minecraft world before, but have you ever wondered how that terrain was generated? In this video I go step by step to show you how chunks and biomes are formed, and modify the source code to show you every part of the process!


Blog / Transcript: remptongames.com/2021/02/28/how-minecraft-generates-massive-virtual-worlds-from-scratch


Chapters:

00:00 Intro

00:38 Background Information
02:51 Chunk Generation Intro
04:10 Heightmap Stage

04:43 Ore Stage
05:01 Surface Stage
05:17 Carving Stage
06:05 Decoration Stage
06:20 Biome Generation Intro
07:09 Waterworld
07:47 Add More Land

08:17 Separate Cold Clusters + Temperature Discussion
09:29 Separate Cold and Warm Clusters
10:24 Assign Biomes
11:17 Add Biome Variations
11:32 Add Rivers, Shores, Etc.
12:00 Conclusion