Description
Certain trees generate differently when the same world region is rendered multiple times using the same seed.
Steps to reproduce
Create a world with seed -7512197374154379512
Teleport to the following coordinates:
/execute in minecraft:overworld run tp @s 745.33 83.00 622.13 64.53 40.55Take a screenshot of the area, then open the image in another window for comparison.
Quit the world and re-create it (using the same seed).
Repeat the teleport command to return to the exact same position and compare the current generation with the previous screenshot.
Switch windows from Minecraft and the screenshot
Observe the discrepancies in tree placement or shape.
Expected result
Tree generation should be identical and consistent across multiple world creations using the same seed.
Actual result
Some trees generate with different shapes, types, or in different positions despite using the same seed.
Additional notes
Found in version 1.21.11; possibly affects other recent versions as well.
Attached screenshots show the differences between the first and second generation attempts.
Confirmed on my local machine; need to verify if this is seed-specific or a general world-gen issue.
Environment
Windows 11 Professional 25H2
Linked issues
Attachments
Comments 2
The Environment field is supposed to only contain PC details.
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We are tracking this issue in MC-55596, so this ticket is being resolved and linked as a duplicate.
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