Java Edition 1.18 experimental snapshot 4

1.18 experimental snapshot 4 is the fourth experimental snapshot for Java Edition 1.18, released on August 17, 2021, which makes numerous changes and tweaks to world generation.

World generation

 * Biomes
 * Tweaked biome placement in general to reduce the risk of harsh collisions.
 * Now biome placement is a bit smoother and less noisy. This should result in fewer microbiomes.
 * Removed surface freezing for hot biomes, and raised the altitude at which snow layers are placed.
 * Badlands and Desert
 * Now are larger and less likely to show up as ugly microbiome splotches.
 * Terracotta bands now go higher.
 * Wooded badlands grass and trees now start higher.


 * Desert pyramids
 * Now tend to be partially buried
 * No longer generate on water.


 * Extreme Hills
 * The terrain now are less unextreme. And fiddled with the placement of shattered terrain and extreme hills in general, to make it fit in with the terrain better.


 * Jungle pyramids
 * No longer generate on water.


 * Rivers
 * Reduced the likelihood of rivers being cut off and turning into steep dry river gorges in mountainous terrain.
 * Instead rivers will tend to either carve a fjord through the mountain range, or raise the terrain to form a saddle valley between the peaks.
 * This should make the terrain friendlier for both walking and boating.


 * Snowy Slopes
 * Now are less dirty.

Issues
This version is not supported on the bug tracker, and therefore issues affecting it will be resolved as "Invalid".