No Generation -Y

Removes generation below Y=0 in overworld

Applications

• Don't like generation -Y or want to diversify the game
• Lags due to generation below Y=0

Changes

• Removes the generation of -Y in overworld
• The deepslate level starts at Y=32
• Ancient cities and Trial chambers appear at approximately Y=0

Pay attention

• The air of caves and liquids of lakes at Y=0 will NOT be replaced by bedrock
• Structures from experimental functions are not supported
  • Trial chambers (1.20.4-1.20.6)