1.2.0

Added World Generation

• Added the Caves & Cliffs world type with an extended height range from Y=-64 to Y=319.
• Added modern underground generation, including modern cave carving, deepslate regions, amethyst geodes, modern ore distribution, and related cave decorations.
• Added modern mountain and high-altitude terrain generation.

Added Blocks

• Added deepslate, calcite, tuff, amethyst, copper, raw metal blocks, candles, tinted glass, lightning rods, chains, powder snow, and related stairs, slabs, and walls.

Added Items

• Added spyglasses, goat horns, axolotl buckets, powder snow buckets, glow item frames, amethyst shards, raw iron, raw gold, raw copper, copper ingots, and the Otherside music disc.

Added Mobs

• Added goats and axolotls.

Added Biomes

• Added Lush Caves, Dripstone Caves, Meadow, Grove, Snowy Slopes, Jagged Peaks, Frozen Peaks, and Stony Peaks.

Added Commands

• Added /locatebiome <biome> for locating surface biomes and three-dimensional cave biomes in Caves & Cliffs worlds.

Added Compatibility

• Added OptiFine shader compatibility.
• Added YUNG's Better Mineshafts compatibility for modern mineshaft support columns, hanging chains, and support continuation below Y=0.
• Added height and rendering compatibility for Nothirium, Celeritas/Actinium, Distant Horizons, and other extended-height render paths.
• Added extended-height map and waypoint compatibility for VoxelMap and Xaero's World Map/Minimap.
• Added extended-height integration for Cave Biomes, Depths Update, and Caves Not Cliffs, including world-height validation and core hooks.
• Added per-content automatic avoidance for Depths Update, Deeper Depths, Caves Not Cliffs, Future MC, Oceanic Expanse, and other providers. Blocks, items, and entities are resolved independently instead of disabling an entire content group when only part of the group is supplied externally.
• Added axolotl targeting compatibility for registered fish and drowned entities supplied by compatible ocean-content mods.