SpecificLavaFix
SpecificLavaFix stops vanilla's lava-lake fallback from appearing in chunks that players have already visited, on Fabric servers running a void-terrain setup.
What it does
On worlds built from void terrain, such as a Skyblock Infinite style datapack, vanilla can fall back to its hardcoded aquifer and lava settings instead of the datapack's noise configuration, carving giant lava lakes where none were meant. The mod addresses this by sweeping existing chunks that were affected by the blending fallback, and by disabling that fallback so new chunks no longer receive it.
The sweep runs one chunk per tick, throttled as players approach, which avoids the lag spikes a world-wide scan would cause. Each chunk is handled once and then tagged as cleaned, so it is never touched a second time and repeat sweeps do not waste work. Only lava fluid is removed; chunk structures and the rest of the terrain stay untouched, and reset chunks are not deleted.
The mod is published for Fabric only, across two game versions, 26.2 and 26.3, with 1.0.0 for 26.3 as the latest file. It runs on the server, so players join without installing anything. The project is not open source and is released under All rights reserved.
Key features
Lava blending fix
Disables the blending fallback that places vanilla's default lava-lake generation near void terrain.
Throttled chunk sweep
Existing affected lava chunks are cleaned one at a time as players approach, avoiding a world-wide scan.
Permanent cleaned tag
Each handled chunk is marked done, so it is not processed again and the tag cannot be reapplied.
Lava-only removal
Only lava fluid is removed, while structures and terrain shape are left as they are.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Void-terrain servers
Servers running a Skyblock Infinite style datapack can keep the datapack's noise settings for lava placement.
Who it’s for: Server owners who run void-terrain worlds on Fabric for 26.2 or 26.3 and have seen unexpected lava lakes in visited areas.
How it compares
Regenerate Chunks is server-side only, open source under the MIT License, and published for 1.21 – 26.1.2, so it covers a different version range. Skyblock Creator is server-side only and open source under the Mozilla Public License 2.0, with files for 1.18.2 – 1.19.4. Better Lava Lakes is not open source, is published for 26.2 on Fabric and runs on client and server.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| SpecificLavaFix | Fabric | 26.2 – 26.3 | Server-side only | 2026-10-05 |
| Regenerate Chunks | Fabric | 1.21 – 26.1.2 | Server-side only | 2026-05-13 |
| Skyblock Creator | Fabric | 1.18.2 – 1.19.4 | Server-side only | 2023-03-14 |
| Better Lava Lakes | Fabric | 26.2 | Client and server | 2026-07-17 |
Questions
Does SpecificLavaFix need to be installed on the client?
Which Minecraft versions does SpecificLavaFix support?
Will the mod remove lava from chunks that have already been visited?
In the catalog
SpecificLavaFix is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 8,071 mods support Minecraft 26.3.
More from official.andy
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What the author says
Stops the vanilla chunk-blending fallback from flooding void skyblock worlds with lava after a Minecraft version update — built specifically for the Skyblock Infinite datapack. If you run Skyblock Infinite (or a similar void-terrain datapack) and update your server's Minecraft version, you've probably seen it…
Official listing
- Modrinth page
- modrinth.com/mod/specificlavafix
- Owner
- official.andy
- Published
- 2026-07-18
- Updated on Modrinth
- 2026-10-05
- Facts verified
- 2026-10-15