For normal people

• Entirely new overworld design.
  • Rivers no longer attempt to go through mountains and fail.
  • Cave system now depend on various surface parameters.
    • For example, lush caves spawn under forests.
  • Some tree types (like oak) are now easier to find.
• Nether walls between biomes now only extend up to Y 512, making traversal at higher Y levels easier.

For data pack developers

• Added new json-defined custom class system, supporting inheritance, object-oriented design, and can be used in most other scripts.
• All Big Globe custom registries are now in the bigglobe namespace.
  • Previously, they were in the "minecraft" namespace, which meant that you had paths like /data/namespace/bigglobe_whatever/....
  • Now, every registry added by Big Globe is in a folder named "bigglobe". So you get paths like /data/namespace/bigglobe/whatever/....
  • A script has been provided to move all files to the correct location automatically.
    • This can be found on my github page, under the name "V6DataPackConverter.java" in the root directory.
    • This script will NOT migrate any json schema changes.
• Scripted configured features now handle coordinates relative to their placement position.
  • The now-useless originX/Y/Z variables are now always 0, and the translation to the actual placement position is handled internally, just like random rotation and flipping.
  • The actual placement position can now be obtained with the placementX/Y/Z variables, if needed.
  • This should not affect most scripts, but there are a few cases where this can matter:
    • If the script attempts to re-assign originX/Y/Z, this will now cause a compile error.
    • If the script is using originX/Y/Z as a seed for RNG, you will now get the same seed for all positions.
    • Scripts that place blocks at an absolute position instead of a relative one will either need to be converted accordingly, or be placed at a position that cancels this out.
      • For example, if the script tries to place blocks at a specific Y level, then your feature dispatcher should place it at Y 0.
• Added new "quintic" noise source. Similar to cubic noise sources, but the derivative is smooth instead of just continuous.
• Extra mob spawns have been replaced by mob spawn tweakers, which are similar, but script-driven.

Missing functionality

• Islands world preset has not been re-implemented on top of new systems yet.
• Mushroom and molten caves do not currently spawn anywhere.