When generating new terrain from 1.21.5 pre 3 there is no transition between chunks and it causes abrupt and ugly cuts between chunks.
Environment
I was testing 1.21.5 Pre 3 generating new terrain to get the new mobs and I found that the new generation chunks generate abruptly without transition.
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is duplicated by 2
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The terrain is from before 1.8. I know the generation is different, but before 1.21.5 pre-3, there was a transition between old and new chunks where the difference was barely noticeable. It wasn't that abrupt.
It seems like chunk blending doesn’t work anymore between chunks with the same DataVersion. This is most evident when using “Optimize World“ on an older world.
Example:
Generate a world in 1.16.5.
Switch to 1.21.5-rc1 and use “Optimize World“ on this world.
Fly to where new chunks should appear.
Observe a hard edge in the terrain.
The last version where “Optimize World“ worked as intended was 25w08a. When repeating the steps above with 25w08a the blending works as expected:
[media]I opened a similar issue a few days ago, assuming this only affects blending when “cancelling” the generation of surrounding chunks:
What was the last version this world was played on? (before 1.21.5 Pre-Release 3)