
New flat worlds using the Caves & Cliffs experimental toggle will generate starting at "y=-64".Upgrades older flat worlds to the new extended heights available with the Caves & Cliffs experimental toggle.Chunks previously upgraded with Bedrock underneath will not see this change.

Added new world/cave generation when upgrading saved chunks below Y=0 using the Caves and Cliffs experimental toggle.Sometimes generate layers (strips) of calcite.Sometimes generate layers (strips) of gravel.Mountain areas and peak biomes now are slightly larger on average.Mountain tops are now more jagged and pointy.

