21w06a

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21w06a is the ninth snapshot for Java Edition 1.17, released on February 10, 2021. It adds new cave generation and a new build height limit.

Additions[]

Overworld build and generation limits have been expanded.
- There are two types of big caves. The first one is cheese caves, and then the noodle caves.
Mineshafts adapted to larger caves.
One can no longer crouch or jump to prevent a big dripleaf from tilting.
A big dripleaf will now tilt rather than break when hit by a projectile.
A redstone powered big dripleaf will not tilt (except when hit by a projectile).
The textures for hanging roots and small dripleaves have been updated.
Generation range and build limits have been expanded by 64 blocks up and 64 blocks down, to a total range of 384 blocks.
Underground features, structures, and caves generate all the way down to y -64.