Ice Caves Backport 0.1.7 — Snapshot 5

New content

• Added Packed Ice Bricks, Packed Ice Brick Slabs, Stairs and Walls, and Chiseled Packed Ice, using the snapshot's textures, block properties and drops.
• Added all 14 crafting and stonecutting recipes, recipe unlocks, and the What Goes Around Comes Around advancement for killing a Frostbite with an Ice Ball.
• Added the 23 ambient ice sound samples and the snapshot's water, air and surrounding-ice requirements.
• Added the new full blocks to the fast-sliding Sulfur Cube tag on versions that support Sulfur Cubes.

Fixes and parity updates

• Fixed upside-down floor icicle tips and stems on older Minecraft versions. Snapshot rotations and shading are translated into formats those versions understand.
• Fixed missing icicle block and item textures, while retaining transparent cutout rendering.
• Fixed Forge 1.20.1 bypassing the new vanilla ice sound families during placement, mining, breaking, walking and landing.
• Frostbites now require sky access outside Ice Caves, preventing them from spawning in ordinary underground caves beneath cold surface biomes.
• Preserved Frostbite poison and regeneration immunity across older effect systems.
• Updated 26.3 mob-projectile adventure permissions while retaining mob-griefing restrictions.
• Updated crevasse placement to snapshot 5's settings; retained safeguards against leaking water into open caverns.
• Added Ice Caves to the ruined-portal and stronghold biome tags.
• Updated our NeoForge 26.2+ icon metadata. Deprecated metadata warnings from other libraries in development runs are not release-installation errors.
• Added version-specific recipe, advancement and loot compatibility checks across every supported release build.
• Matched the snapshot's slab explosion-drop behavior without applying explosion survival twice.

Ice Caves retain the snapshot's climate limits; there is no intentional one-chunk size cap. Biome placement and cavern shape vary with the world seed and Minecraft version.

Supported versions

Fabric and NeoForge: 26.3, 26.2, 26.1.2, 1.21.11 and 1.21.1. Fabric and Forge: 1.20.1.

New content uses minecraft: registry IDs. World-generation changes affect newly generated chunks; existing terrain is not rewritten. Back up important worlds before updating.