Ground doesn't render underwater

1.21.1, 2.4.0b neoforge, modlist on screenshot

Render distance 12, DH is 96, Extreme preset, aggressive cpu load. Cloud rendering disabled

Strangely, with shaders (I had disabled iris previously to attempt to fix the issue) everything looks fine, but when I disable them the issue reappears.

I tried to create a fresh world and the issue is still there just as it is, ground underwater doesn't render beyond vanilla render distance, and caves do.

ΞDΞNOP•12/13/25, 11:29 PM

something fog related, fog far away actually renders fine as shown on screenshots

ΞDΞNOP•12/13/25, 11:47 PM

It's a bug of 2.4.0b, on 2.3.6b in a fresh world everything looks perfect.

ΞΞDΞN It's a bug of 2.4.0b, on 2.3.6b in a fresh world everything looks perfect.

ΞDΞNOP•12/13/25, 11:49 PM

jumped into the 2.4.0b testing world while being on 2.3.6b and on new terrain to generate "old" lods everything looks perfect as well.

ΞDΞNOP•12/13/25, 11:49 PM

/\ both these tests on neoforge 1.21.1 with only distant horizons installed on fresh worlds

ΞDΞNOP•12/13/25, 11:50 PM

guess the fix 4 me is to roll back to 2.3.6b and reset lod data ¯\_(ツ)_/¯

upd did exactly that and it worked

Miki_P98•12/14/25, 9:51 AM

This is:

!overdraw
!fog

YAGPDB.xyz•12/14/25, 9:51 AM

Q: There are holes at the edge of vanilla Render Distance, especially during movement
A: This is caused by either vanilla terrain not loading in fast enough, or shader's incorrect overdraw prevention implementation or configuration (if you use one)
Some world gen speed improvement can be found when adding these three mods, but the affect will be minor:

Noisium
Faster Random
C2ME (DH 2.3.0+)
The easiest fix is to move slower and/or ignore it. This hole is most visible while moving over not generated (by vanilla) terrain. Moving over that terrain every subsequent time may not create the hole. And moving slower will give MC more time to load the chunks as you go.
If none of that helped, you can also tune the overdraw prevention, look at the fourth section to know how.

Q: There are low quality full blocks behind and around non-full block, e.g. fences or ladders
A: This is intended behavior, to prevent holes in the world while you move, DH will overlap with some part of the vanilla terrain.
How much of the terrain is covered is determined by the overdraw prevention:
1.0 will mean DH LODs start where vanilla chunks end.
0.1 will mean that DH render very close to the players position.
0.0 sets it on auto mode.
To fix this, you can either:
Increase your vanilla RD, which will move the DH LODs further from you.
Tune the Overdraw Prevention setting, see the next section to know how.

Q: Where do I edit the overdraw prevention setting?
A: Overdraw prevention setting can be edited inside the DH config under:
Advanced > Graphics > Culling
BUT: if you use shaders, they will influence overdraw prevention. The effectiveness of overdraw prevention depends on the shader’s internal settings, which may or may not be adjustable. However, the shader’s overdraw prevention will always operate within the limits set by DH’s overdraw prevention. To avoid conflicts, ensure that DH’s overdraw prevention is not set too high.

Miki_P98•12/14/25, 9:51 AM

Sections 1 and 3

YAGPDB.xyz•12/14/25, 9:51 AM

You can remove fog in the config at: Advanced > Graphics > Fog > "Disable vanilla fog" or with mods like Sodium Extras, Optifine, or some other fog removal mod.
If the fog is still there and you have BCLib installed, you have to disable BCLib’s fog too.

Ground doesn't render underwater

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