Tuesday, November 8, 2011

How do I fix my vintage world?

Question

My favorite single-player map is relatively old - created no later than beta 1.1. Since then, the terrain generation algorithms have changed. When I explore any farther, I'm faced with glitches like sliced mountains and differences in sea level.

I tried making a new world with the same seed, but it turned out completely different.

Is there a way to smooth the transition between the old and new automatically, or will I have to run around terraforming myself?

Answer

The world generation has radically changed since 1.8 (and will change again in 1.9+), so it's most likely not possible to directly run your world again. In my tests, a world imported from 1.7.3 into 1.8 did have significant changes in the biomes and the landscape.

A workaround which would always work, if you're ready to relinquish new features, would be to keep the binaries (~/.minecraft/bin) of the old version around and swap them around as needed.

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