About Subterranean Expansion | Cave Update
From ModrinthOverhaul of underground caves in the overworld.
About Subterranean Expansion:
Subterranean Expansion enhances the underground experience of vanilla caves by introducing new natural features and unique cave environments to bring you the cave update we all actually wanted.
Stalagmites & Stalactites: 
Stalagmites and Stalactites of all vanilla stone variants, and even some custom stone variants.
Stalagmites & Stalactites
In Release 1.0.0:
- Stone Stalagmite/Stalactite
- Mossy Stone Stalagmite/Stalactite
- Granite Stalagmite/Stalactite
- Diorite Stalagmite/Stalactite
- Andesite Stalagmite/Stalactite
- Deepslate Stalagmite/Stalactite
- Tuff Stalagmite/Stalactite
- Sandstone Stalagmite/Stalactite
- Deep Sandstone Stalagmite/Stalactite
- Calcite Stalagmite/Stalactite
Update 1.1.0: Frosted Caves 
IMPORTANT INFO:
This mod is a passion project that doesn't have a whole team behind it. We expect there to be bugs and we will try to fix them. The mod is still in active development and is planned to add more features. Other than that, enjoy our mod! ##
Recommended mods:
You should stock up on worldgen optimization mods, as this mod tends to slow it down a bit due to the added complexity. Here are a few:
##
FAQ:
Is there a config file?
As of update 1.1.0 there is.
Will you port to X mod loader?
No. We are going to currently use Forge for 1.20.1, although we are not opposed to do so in the future.
Where can I report bugs?
You can report in the issue tab.
Can I use this in my modpack?
Yes.
I have a suggestion, how do I suggest it?
You can suggest it in the issue tab with the suggestion tag.
Highlights
From source dataGame versions
Supports 2 Minecraft versions, the newest being 1.21.1.
Loaders
Runs on Forge and NeoForge.
Footprint
Rated a light load on a server.
Subterranean Expansion | Cave Update on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
- Server side
- Required on the server
- Server type needed
- Forge, NeoForge
- Server load
- light
- Smallest plan we suggest
- Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 1.1.1, released 2026-08-17
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Forge | 1.20.1 | 1.20.1 |
| NeoForge | 1.21.1 | 1.21.1 |
From 5 recorded builds of Subterranean Expansion | Cave Update.
Recent builds
| Build | Released | Game versions | Loaders |
|---|---|---|---|
| 1.1.1 | 2026-08-17 | 1.21.1 | NeoForge |
| 1.1.1 | 2026-08-17 | 1.20.1 | Forge |
| 1.1.0 | 2026-08-13 | 1.21.1 | NeoForge |
| 1.1.0 | 2026-08-13 | 1.20.1 | Forge |
| 1.0.1 | 2025-09-24 | 1.21.1 | NeoForge |
Run Subterranean Expansion | Cave Update on a Minecraft server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogWorld generation
Changes or adds to how new terrain, biomes and structures are created.
Runs on your server
From source side supportModrinth lists Subterranean Expansion | Cave Update as required on the server. Check its Modrinth page to see whether players need it too.
Compatibility
- Game
- Minecraft
- Loaders
- ForgeNeoForge
- Runs on
- Serverrequired on the server
- Game versions
- 1.21.1 and 1 earlier
Verified at the source
- ✓ModrinthOfficial listing, checked 2026-10-02Open ↗
- ✓AuthorDesblivion, as published on Modrinth
- ✓LicenseLicenseRef-All-Rights-ReservedFree
