Spawn rates for certain mobs are way too high in the warped forest and soul sand valley. This causes the following problems:
Warped forests spawn as many endermen as the End dimension itself
Soul sand valleys spawn too many ghasts, at least ten times more than nether wastes or basalt deltas. (with rough estimates, soul sand valleys usually have 5 ghasts, while nether wastes and basalt deltas sometimes have a ghast)
Soul sand valley ghast spawn rate breaks other mob spawning as well. As ghast spawn attempts fail, endermen and fortress mobs build up and spawn way more than usual. This event doesn't happen in other biomes, so it's definitely the ghasts.
Linked issues
is duplicated by 46
MC-174269
in hard mode a massive amout of ghast spawn
Resolved
MC-170821
Mobs spawning in unnaturally large groups, in the Nether.
Resolved
MC-170856
High Enderman Spawn Rates In Warped Forests
Resolved
MC-170861
Hoglins spawn rate seem to be too high
Resolved
MC-170864
Too many endermen spawning in the Nether
Resolved
relates to 1
Attachments
Comments 27
Since the spawn rate for endermen, ghasts and hoglins are increased in the new biomes, I'm starting to notice that magma cubes spawning is very low. Not sure if the spawn rate for magma cubes was like this before or it got lower in the 20w06a snapshot.
From my testing, when killing all nether mobs except magma cubes, magma cubes appear to only spawn in nether wastes and fortresses.
Here is the list of mobs that spawn in each nether biome (without fortresses):
Nether Wastes: endermen, ghasts, zombie pigmen, magma cubes
Soul Sand Valley: endermen, ghasts, skeletons
Crimson Forest: zombie pigmen, hoglins (is the only place in Minecraft that does not spawn endermen)
Warped Forest: endermen
The best example of this bug is endermen in the warped forest; because only endermen spawn there, they completely fill the mob cap, causing a ton of endermen to spawn. One way to fix this would be to make a mob cap for each mob, for example, only up to 10 endermen can spawn in the nether. This could make mob spawning more balanced without having a complete overhaul.
Cannot reproduce for warped forests in 20w17a, as I have never found one with a radius any greater than 100 blocks (this prevents endermen from spawning as if they were in the end, awesome change assuming it's not a bug).
Edit: I have recently reproduced for the warped forest, but it's very rare to get as many endermen as the end dimension itself. Also it doesn't seem unbalanced anymore because warped forests are a lot more rare. The biome rarity changes weren't mentioned in the changelog for 20w17a so I'm leaving warped forests in this ticket.
Edit 2: Warped forests being too small is MC-179944.
As someone who usually enjoys the combat (even though I am poor at it), the number of ghasts is irritating because:
Ghast are so loud even when not attacking you their idle noises are some of the loudest in the game so many Ghast are VERY noisy,
With the number of Ghasts looking around is an occupational hazard,
being hit with three fireballs in a row is mildly annoying and can get your stuff burnt upon death.
They make exploring substantially more tedious, especially if you're trying to cross a gap
and the spawn rate of enemies in Bastions that are in Soul Sand Valleys make traversal cumbersome
I've encountered this problem. I would also add that mob spawning of any kind of mob has been insanely high in the snapshots. I'm finding groups of twenty squid all spawned in the same 9x9 block space (even when the whole ocean was nearby, so it's not like it was the only place for them to spawn), encountering waves of 10-20 mobs all within a small corridor in caves, bat spawning in caves is so high you can't hardly see, etc. I think this may be an issue caused by the developers finally fixing the years-old bug that didn't auto-despawn mobs when reaching a certain distance from them. Perhaps since the bug was around for so long, they bumped up the spawn rates of everything to work around it, and now that it's been fixed, spawn rates are far too high.
The snapshot post says Warped Forests are the least hostile place of the nether, so perhaps this is intentional. It also mentions skeletons in the soulsand valley biome. In my opinion the increased ghast spawnrate fits well with the soulsand valley, and I think the only thing that's a bug here is the enderman spawn rate in the warped forest being absurdly high.