Alex's Caves (Unofficial Port)

• Prevent Alex's Caves surface rules from leaking into non-Overworld dimensions.
• Guard biome decoration to avoid C2ME chunk feature index crashes.
• Ensure neodymium nodes drop raw neodymium without Silk Touch (with Fortune scaling).
• Ensure sulfur blocks/buds/clusters drop sulfur dust without Silk Touch (with Fortune scaling).
• Sync mod metadata version to 2.0.9.
• Various other fixes.

Rendering fixes:

• Added x-ray render type for Raycat bones (visible through walls)
• Fixed Gummy Bear baby scaling and ARGB color handling
• Fixed Candicorn horn and particle rendering
• Fixed StunStarParticle rendering

Entity fixes:

• Fixed GumWorm segment collision and AABB handling
• Fixed DeepOne entities now don't drown in water
• Fixed Corrodent path navigation for proper mob behavior
• Fixed LimestoneSpear entity spawning and damage

Worldgen/Structure fixes:

• Added ACBiomeRarity checks to structures (AbyssalRuins, DonutArch, SodaBottle)
• Removed primordial_caves_lake feature (replaced with different implementation)
• Fixed structure biome configuration for candy cavity biomes
• Added is_candy_cavity biome tag

Other:

• Updated build.gradle dependencies
• Various data file cleanup and organization

• Fixed Forlorn Hollows biome structures not generating when biome is enabled
• Fixed neodymium polarity effect being too strong and trapping players
• Fixed neodymium nodes being as strong as pillars (now 40% weaker)
• Removed debug logs spamming server console during Forlorn Hollows generation

• Fixed biome blocks not generating on walls/ceilings
• Fixed Abyssal Chasm spawning under rivers/lakes instead of oceans only
• Fixed vanilla structures spawning inside AC biomes
• Fixed submarine camera position
• Fixed neodymium polarity not working
• Fixed Darkness Outfit flight not ending
• Fixed Notor scanning shader crash
• Fixed Primitive Club damage/attack speed
• Fixed Trilocaris drowning
• Fixed Holocoder and Hologram Projector not working
• Fixed Cave Codex colors
• Reduced geothermal vent and neodymium density
• Removed end poem modification
• Removed console log spam

1.21.1 Port - Major fixes and improvements

Biome Generation:

• Fixed biome distance-from-spawn check using biome CENTER position instead of sampling position
• Added config version system (v3) that auto-deletes old configs when version changes
• 4/6 biomes working: Magnetic Caves, Primordial Caves, Toxic Caves, Candy Cavity
• Forlorn Hollows and Abyssal Chasm still need work (known issue)
• Added /locateacbiome command for debugging biome generation

Items & Equipment:

• Fixed Darkness Armor meter/ability not working (merged charging logic into inventoryTick)
• Fixed Seeking Arrow not firing from Dreadbow (updated createArrow signature for 1.21)
• Fixed Burrowing Arrow createArrow signature for 1.21 compatibility
• Fixed custom Rarity enum issue - using standard Rarity values as placeholders

Entities:

• Fixed Submarine camera position being too high (corrected positionRider calculation)

Tags:

• Added missing neoforge:storage_blocks/uranium tag
• Added missing neoforge:storage_blocks/gold tag
• Added missing neoforge:nuggets/iron tag
• Added missing neoforge:raw_materials/iron tag
• Added missing neoforge:gravel tag

Cleanup:

• Removed excessive logging from ACBiomeMapHolder and BiomeSourceMixin