1.2.4

Added

• Added configurable powder snow mob transformation rules.
• Added configurable powder snow immunity rules.
• Added configurable additional damage rules for mobs inside powder snow.
• Added a configurable list of boots that allow entities to walk on powder snow without getting stuck.
• Added Campfire compatibility for pacifying bee nests and bee hives with lit campfires and braziers.

Fixed

Height, Crashes and Stability

• Fixed crashes caused by negative-height section indexing in Realistic Block Physics and Realistic Physics.
• Fixed crashes caused by mixed fluidlogged states in Fluidlogged API.
• Fixed natural mob spawning below Y=0 when OptiFine is installed.
• Fixed extended-height rendering compatibility with Pintonium and Celeritas.
• Fixed negative-height collision failures when StellarCore and ThaumicForever are installed together.
• Fixed mobs falling through blocks below Y=0.
• Fixed ground mobs incorrectly pathfinding, rounding Y coordinates, or attempting to jump onto invisible blocks below Y=0.
• Fixed Cleanroom, CleanMix and Alfheim loading-order and Mixin compatibility issues.
• Fixed Fluidlogged API compatibility for static-liquid build-height checks.

World Generation

• Fixed dimension-specific biomes from mods such as Twilight Forest appearing in the Caves & Cliffs overworld.
• Fixed Better Mineshafts structures being cut off at Y=0.
• Fixed Deadly World generation, floor features and ore veins in negative-height areas.
• Improved Nether fungi, Nether vegetation and Nether vine generation behavior.
• Improved Lush Caves vine support checks and large dripleaf cross-chunk generation.
• Optimized Nether fungi forest lighting generation.
• Improved compatibility between Nether fungi forest lighting and Alfheim's deferred lighting system.

Deepslate Redstone Ore and Negative-Height Behavior

• Fixed lit deepslate redstone ore not emitting light.
• Lit deepslate redstone ore now emits light level 9.
• Improved deepslate redstone ore lighting, particles, trampling and interaction behavior.
• Fixed mobs attempting to jump toward invisible blocks below Y=0.

Waterlogged Blocks, Shaders and Rendering

• Fixed compatibility between waterlogged blocks, Fluidlogged API, OptiFine shaders and Aqua Acrobatics.
• Fixed water surface and leaf-edge rendering issues on waterlogged large dripleaves.
• Fixed waterlogged block rendering anomalies when viewed from different directions.
• Fixed incorrect powder snow particles after powder snow is destroyed or extinguishes fire.
• Fixed incorrect visible-section calculations when looking down from high elevations in extended-height worlds.
• Fixed the held-item size and orientation of hanging roots.
• Fixed cave vine attachment-face detection.
• Fixed spore blossom particle counts and particle-setting compatibility.
• Fixed candle particle scale, render distance and particle-setting behavior.

Automatic Avoidance and Registration

• Improved automatic avoidance to evaluate blocks and items individually.
• Fixed incomplete avoidance for copper blocks, amethyst items and different oxidation stages of copper blocks.
• Fixed items remaining visible in the Creative inventory after their registrations were avoided.
• Fixed mismatches between avoided item registrations, replacement items and external mod item mappings.
• Fixed generation-time replacement of Farmer's Future Delight blocks with corresponding external mod blocks.
• Fixed stacking behavior for candles, turtle eggs and sea pickles so that additional blocks can be placed by targeting the block below.

Bees

• Improved parsing, display and application of configurable additional bee pollination targets.
• Fixed bee behavior related to Creative and Spectator mode players.
• Improved bee nest and beehive honey-level synchronization and persistence.