1.12.2-0.0.970.0:

• Fixed potential unclosed file leak
• Updated Mixin to 0.7.10
• Fixed chunk leaks
  • Fixed removing entries in XYZMap (caused all extra chunks up to the biggest size of XYZMap for that world to be kept in memory)
  • Fixed chunk tracking corner case when moving very fast
• Use shared, global region file cache. Keeps less files open (could cause "too many open files" on some linux distributions)
• Improved performance when moving very fast
• Optimized async chunk loading
• Fixed sometimes unloading chunk that contains the player when moving very fast
• Fixed scheduled ticks not working as intended (fixes redstone behavior and liquids not flowing after reloading chunks)
• Added more options to force creating or loading cubic chunks worlds:
  • NONE - only cubic chunks world types will create cubic chunks worlds (default)
  • NEW_WORLD - when creating new world (equivalent to selecting "yes" for cubic chunks in world creation GUI)
  • LOAD_NOT_EXCLUDED - any world that isn't in excluded dimension list will be loaded as cubic chunks world. This will try to load vanilla worlds as cubic chunks (won't convert existing chunks!)
  • ALWAYS - load all worlds as cubic chunks worlds (except mod fake worlds)
• Removed debug items when debug option is enabled
• Save isCubicWorld flag with the world, to correctly handle excluded dimensions
• Fixed NullPointerException crash with some mods (crash when setting blocks in unloaded cube clientside)
• Added config option to control how biome temperature changes with height
• Fixed potential crash when setting blocks in empty cube
• Fixed falling blocks causing infinite loop when loading/generating world with no blocks below
• Compatibility with OptiFine E4 pre4
• Fixed crash when trying to load a tile entity with saved position not matching position of the cube it's saved in
• (experimental) NEID and partial JEID compatibility.
• More mod friendly way to detect creating cubic chunks world. Should work wit mods that replace world creation menu

1.12.2-0.0.926.0:

• Better compatibility with OptiFine E2 on newer Forge versions and OptiFine E3
• Fixed never removing TileEntities clientside, causing small memory leaks, performance issues, and potentially crashes
• Fixed mob AI below y=0
• Optimized chunk ticking
• Faster and more correct entity spawning
• Partial support for Forge chunk loading API
  • ChickenChunks is not working due to it's internal implementation
• Fixed incorrectly handles scheduled ticks, causing broken redstone and liquid behavior
• Fixed snow not generating above y=256 (may break existing world preset by generating snow in unintended places!)
• Allow vertical render distance up to 64 when OptiFine is installed
• Fixed render distance above 32 when OptiFine is installed
• Fixed Minecraft hanging when entities teleport in cubic chunks end
• Implemented vertical view distance affecting chunk rendering
• Removed debug logging for chunk saving to decrease noise in server logs
• Fixed nether portal handling in cubic chunks world
• Reverted vanilla nether portal handling when in a vanilla world
• Fixed grass not growing beyond vanilla height range
• Fixed mushrooms not working correctly beyond vanilla height range
• Fixed lava not causing fire above y=256
• Added internal fixes for handling player spawning and respawning
• Fixed typos in configuration
• Fixed finding spawnpoint

1.12.2-0.0.902.0:

• Fix server sometimes hanging when teleporting to/from nether
• Support for 3D biome storage
• Fix Forge mod world generators not working in cubic chunks world in default world type
• Partial implementation of using forge mod world generators in CustomCubic and other world types (do not use!)
• Optimize population when there is nothing to do for CustomCubic (CWG)
• Optimize part of light propagation
• Make generated spawn area same size as vanilla (much faster spawnpoint generation and loading)
• Improve world generator API, other API improvements (breaks compatibility with existing cubic chunks world generators)
• Fix server hang in AI code when at very high Y position, also fixes incorrect AI behavior when near cliffs
• Internal changes for ForgeEssentials compatibility
• Update mixin library