Cast Away
by Riser876
Cast Away stops lava and water from producing new cobblestone when they meet, which breaks lava casts on Fabric servers.
What it does
Cast Away is a server-side Fabric mod that changes how lava and water interact. In vanilla Minecraft, lava flowing into water produces a new block, and the result depends on several factors. A common exploit uses that reaction to build large lava casts. Cast Away intercepts the call that generates the new block, so cobblestone is no longer created when lava meets water. The change is targeted: stone and obsidian generation keep working as usual, and modded fluid interactions are left unaffected unless they involve the lava and water variant.
Cast Away is intended for servers where lava casts cause griefing or lag. The check sits inside shouldSpreadLiquid, the method that decides when cobblestone forms where lava meets water. The mod adds no extra load to the game beyond that check. The mod is published for Fabric only, for 1.19 – 26.3 with 29 release versions, and the latest Fabric file is 3.0.2 for 26.3, released 2026-06-19. It is released under the MIT License, and the source code is open source.
Key features
Blocks cobblestone generation
Lava flowing into water no longer generates cobblestone, so lava casts stop working on the server.
Keeps other generators
Stone generators and obsidian generation keep functioning as usual, so other builds are not affected.
Water level settings
Config options check the water level, including a boolean default, a water-level property scaled from 1 to 7, and a water-falling setting.
Mixin-based change
A Mixin intercepts the point where the game produces the new block at the spot where lava touches water.
Gallery
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x12 of 12 versions with builds
1.20.x7 of 7 versions with builds
1.19.x5 of 5 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Protecting a survival server
A server owner can stop players from building lava casts that drain resources and damage the world.
Who it’s for: Server owners running Fabric who want to prevent lava cast griefing without changing other fluid behavior. Players only need to join the server; the mod is not required on the client.
How it compares
LazyFluids is server-side only, published for Fabric 1.20.1 under the MIT License, and is not open source. Cobblores is also server-side only and published for Fabric 1.20.1, but it is open source under the MIT License. Lava Pull is client and server, published for Fabric 1.16.5 – 1.21.11, and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Cast Away | Fabric | 1.19 – 26.3 | Server-side only | 2026-06-19 |
| LazyFluids | Fabric | 1.20.1 | Server-side only | 2025-08-27 |
| Cobblores | Fabric | 1.20.1 | Server-side only | 2025-01-18 |
| Lava Pull | Fabric | 1.16.5 – 1.21.11 | Client and server | 2026-04-20 |
Questions
Does Cast Away need to be installed on the client?
Which game versions does Cast Away support?
Does Cast Away stop stone or obsidian generation?
In the catalog
Cast Away is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 8,071 mods support Minecraft 26.3.
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What the author says
CastAway is a lightweight Minecraft mod for Fabric that prevents lava cast griefing by modifying the way lava and water interact. Specifically, it disables the automatic generation of cobblestone when lava meets water, thus breaking lava casts. CastAway is ideal for servers where lava casts are problematic, offering…
Official listing
- Modrinth page
- modrinth.com/mod/castaway
- Owner
- Riser876
- Published
- 2025-04-09
- Updated on Modrinth
- 2026-06-19
- Facts verified
- 2026-10-15