Deeper Nether Biomes

Mod

by Moon_Slime

A simple mod that makes it so vanilla minecraft nether biomes are more than just skin deep.

Type

Mod

CurseForge Downloads

492,360

CurseForge ID

416108

Last Updated

Jul 28, 2026

Description

Deeper Nether Biomes

Before / No mod

before mod

After / With mod

after

I am annoyed at the Soul sand valley and Basalt Deltas in the 1.16 nether update. I love their concept, how they look, all but one thing.

They are only on the surface. If you dig any bit into them, you'll run into netherrack. It doesn't make sense for giant cave biomes to only be surface deep. So this mod aims to fix that. Here is what the mod does, summed up...

1) During the UNDERGROUND GENERATION step for soul sand valleys and basalt deltas: Adds in the correct version of nether quartz and nether gold to the respective biomes, replacing netherrack and their own types.

2) During the (modify top-layer) step of generation: goes through and tries to replace as much netherrack, netherrack gold, and netherrack quartz in the respective biomes with the respective filler block. It does it during this step of generation, since it is the last step of generation. It will have the least amount of impact on other mods.

This mod is best used if you pre-generate the nether, as it does add in some lag to having to replace all the netherrack.