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

 * Badlands
 * Now is larger and less likely to show up as ugly microbiome splotches.
 * Terracotta bands now go higher.
 * Wooded badlands grass and trees now start higher.


 * 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.


 * Desert
 * Now is larger and less likely to show up as ugly microbiome splotches.
 * Desert pyramids now tend to be partially buried and no longer generate on water.


 * Extreme Hills
 * The terrain is now more extreme 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.


 * Ore distribution
 * Reduced the number of diorite/andesite/granite blobs on the surface.
 * Copper blobs now are bigger in dripstone caves.
 * Now more iron are generated.


 * 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.


 * Stone shores
 * Now sometimes generate layers (strips) of gravel, diorite, andesite, or granite.


 * Stony peaks
 * Now sometimes generate layers of gravel, calcite, andesite, or granite.


 * Swamps
 * Tweaked swamp placement a bit.
 * Now they are less likely to extend far out from the coastline

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