Depths Update
by __sayys
Depths Update brings the deep-world features of modern Caves and Cliffs to Minecraft 1.12.2 through Forge, extending generation below Y=0.
What it does
Depths Update is a Forge mod for 1.12.2 that ports Caves and Cliffs features from later versions to the older game. It is still under active development, and its builds from 1.0.0-a2 onward show the work so far. Lush Caves and Dripstone Caves are among the generated cave types.
World generation bounds are expanded by lowering the bedrock level to Y=-64, so worlds reach negative coordinates. Below Y=0 the terrain changes from standard stone to deepslate, and deepslate variants of vanilla ores such as copper are included, along with a complete set of deepslate building blocks such as slabs and stairs.
The mod runs on Forge for Minecraft 1.12.2 only. A server running it needs every connecting player to have it too. The project is open source under the GNU Affero General Public License v3.0 only, and public links are available for the source code and the issue tracker. It was first published on 2026-02-28 and last updated on 2026-08-03.
Key features
Backported caves
Caves and cliff generation from later versions are ported to 1.12.2 as a work in progress.
Deeper worlds
Negative coordinates are opened up by lowering the bedrock level to Y=-64.
Deepslate ores and blocks
Deepslate variants of vanilla ores, including copper, plus a full set of deepslate building blocks.
Lush and dripstone caves
Lush Caves and Dripstone Caves are added as underground biomes during world generation.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Caves Not Cliffs [Backported] is also a Forge option for 1.12.2 with the same client and server environment, but it is released under the GNU General Public License v3.0 only. Deeper Caves targets 1.19.2 – 1.20.1 on Forge, is server-side only and is not open source. Deepslate Tweaks is a client and server mod for Fabric, Forge and NeoForge across 1.18.2 – 26.2, and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Depths Update | Forge | 1.12.2 | Client and server | 2026-08-03 |
| Caves Not Cliffs [Backported] | Forge | 1.12.2 | Client and server | 2026-08-31 |
| Deeper Caves | Forge | 1.19.2 – 1.20.1 | Server-side only | 2024-03-05 |
| Deepslate Tweaks | Fabric, Forge and NeoForge | 1.18.2 – 26.2 | Client and server | 2026-07-30 |
Questions
Does Depths Update work on versions other than 1.12.2?
Does the server need Depths Update?
Is Depths Update stable?
In the catalog
Depths Update is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 2,920 mods support Minecraft 1.12.2.
More from __sayys
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What the author says
Depths Update is an experimental, work-in progress mod that aims to backport features of the modern Caves & Cliffs updates into Minecraft 1.12.2. The world generation bounds have been expanded, lowering the bedrock level to y = -64!
Official listing
- Modrinth page
- modrinth.com/mod/depths-update
- Owner
- __sayys
- Published
- 2026-02-28
- Updated on Modrinth
- 2026-08-03
- Facts verified
- 2026-10-15