Lava Source Control
A lightweight datapack that lets you enable or disable lava source conversion on demand, with a persistent toggle that survives reloads. Designed for clean, vanilla-friendly control of lava behavior without mods.
About this Mod
Lava Source Control is a lightweight Minecraft datapack that allows players to toggle lava source conversion on and off, making lava behave the same way as water when the feature is enabled. This allows lava source blocks to be created from adjacent sources using standard water-style mechanics, while disabling it restores vanilla lava behavior. The datapack includes three functions: lava_conversion_on to enable the behavior, lava_conversion_off to disable it, and toggle to switch between the two states.
Use /function ns:lava_conversion_on to enable the feature, /function ns:lava_conversion_off to disable it, or /function ns:toggle_lava_conversion
to switch states. It provides clear in-game feedback, persists its setting across reloads, works without mods, and applies globally to the world. The datapack is built for Minecraft 1.21.x and has been tested on 1.21.11.
Available Versions
How to Install Lava Source Control on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set datapack Loader
In the panel under "Egg", select the datapack loader and matching Minecraft version (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Lava Source Control". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11, 1.21.10, 1.21.9 (+9 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Lava Source Control server crashes on startup – what to do?
Most common cause: wrong datapack version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.
Is Lava Source Control compatible with datapack and fabric and forge and neoforge and quilt?
Lava Source Control officially supports datapack, fabric, forge, neoforge, quilt for Minecraft 1.21.11, 1.21.10, 1.21.9. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Lava Source Control – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Lava Source Control consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Rent Modded Server
Install Lava Source Control with just one click on your server.