General

• Added Basalt and Nether Cave biomes.
• Added Basalt and Nether Flows biomes.
• Added the Nether Beyond technical biome.
• Adjusted the biome source dimension, adding new parameters for biome distribution.
• The carving system was adjusted, adding a more complex system of caves and canyons.

Gameplay

• Added 4 new biomes to the Amethyst Explorer advancement.
• Added blackstone, smooth basalt, and netherrack blobs to cave biomes.
• Added quartz and amethyst geodes to cave biomes.
• Added basalt variant of smoke vent in Basalt Deltas.
• Adjusted ore distribution in cave biomes.
• Adjusted light levels and fog for each biome.
• Adjusted general mob spawning, increasing the weight of Ghast spawns.

Technical

• Added parameters for continentality, density, erosion, and depth.
• Temperature and humidity parameters have been clamped.
• Adjusted the final density of the dimension, adding a more complex river system.
• Adjusted surface dimension rules, making them more optimized.

Misc

• Reorganized features into subfolders, making them easier to manage.
• Organized configured carvers into folders.
• Various major and minor changes.
• Fixed cave carvers cutting at high Y values.
• Fixed non-existent pools in Bastion Gallery.
• Fixed various bugs.

It is recommended not to apply it at all in already existing worlds.