This is a BETA release!

It is ONLY intended for testing the new overworld!
This version changes everything compared to V4.11.
Do not use it with existing worlds, and do not expect existing data packs to work flawlessly!
The remainder of the minor MC versions will be released once testing is complete.

Changelog:

Ported to MC 1.21.5.
Added a new "Soul Silverpetal" flower block.
- Found in the valley of souls.
- When made into suspicious stew, gives a new "soul siphon" status effect.
  - This reduces your max health by 2 hearts per level.
Rivers are now wider.
Removed waterfalls (lavafalls on volcanoes still exist).
The boundary between warm and hot biomes now includes overgrown sand.
Forcibly disabled cave culling when playing with distant horizons. Hopefully this means people will stop complaining about my skylands.
Expanded "Make Big Globe the default world type" config option to allow mod pack makers to specify an arbitrary default world type.
Added new config option to attempt to detect when other mods or data packs provide incorrect world heights for their chunk generators.
Fixed obelisks floating in DH LOD chunks.
Fixed advancements not triggering when entering delegating structures.
Fixed /bigglobe:locate nearest command with C2ME.
Fixed a crash I fixed a while go, but better this time.
Fixed C2ME integration being misnamed in config file.

Completely re-designed the overworld (shouldn't affect island worlds much, if at all).
Fixed being unable to craft gunpowder with sulfur.
Fixed the end dimension not generating terrain more than about 46k blocks from the origin.
Fixed pale netherrack not being in the creative menu (1.21.4).
Fixed charred signs being arranged differently from other signs in the creative menu.