Vanilla Fireflies

Vanilla Fireflies

Datapack that adds ambient fireflies - now they fly not only near bushes.

by
99.3K Downloads
datapackfabricforgeneoforgequiltadventuredecorationmagic
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Screenshots

Fireflies
Fireflies
Logo

About this Mod

Fireflies can be found in the swamp and mangrove swamp biome at night

🏞️ Supported Custom Biomes:

  • Terralith
  • Biomes O' Plenty
  • Regions Unexplored
  • Terrestria
  • William Wythers' Expanded Ecosphere
  • Nature's Spirit

📚 Fireflies Settings

The easiest and recommended way to customize your experience is through the interactive chat menu!

  • Open the Main Menu: /function vanilla_fireflies:menu
    (Use this to quickly select pre-made modes or open the new visual Detailed Configuration dialog).

🛠️ Advanced (Manual Commands)

For users who prefer typing commands manually or want to use them inside command blocks, you can bypass the menu using the following functions:

  • Quick Amount Change:
    /function vanilla_fireflies:amount {amount:<integer>}
  • Fine-Tune Everything:
    /function vanilla_fireflies:configure {amount:<integer>, speed:<float>, delta_x:<float>, delta_y:<float>, delta_z:<float>}

💡 Default Parameters Reference:
If you ever need to reset or refer to the base settings, the defaults are:

  • amount: 60
  • speed: 0.3
  • delta_x: 40
  • delta_y: 10
  • delta_z: 40

📂Installing as datapack

  • Download and install datapack in the world
    • For a new world: You can click the "Data Packs" option when creating a new world and select this datapack

🔧Installing as mod

  • Download and put mod in your .minecraft/mods folder

If you have any questions, bugs, suggestions you can create an issue on github or join our discord server

Available Versions

Vanilla Fireflies 5.0release
MC 26.2fabric, forge, neoforge, quilt
August 21, 2026
Vanilla Fireflies 5.0release
MC 26.2datapack
August 21, 2026
Vanilla Fireflies 4.0.1release
MC 1.21.5, 1.21.6fabric, forge, neoforge, quilt
June 21, 2025
Vanilla Fireflies 4.0.1release
MC 1.21.5, 1.21.6datapack
June 21, 2025
Vanilla Fireflies 4.0release
MC 25w06a, 25w07a, 25w08a, 25w09a, 25w09b, 25w10a, 1.21.5-pre1, 1.21.5-pre2, 1.21.5-pre3, 1.21.5fabric, forge, neoforge, quilt
March 14, 2025

How to Install Vanilla Fireflies on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set datapack Loader

In the panel under "Egg", select the datapack loader and matching Minecraft version (26.2).

3

Install Mod

Open the mod browser in the dashboard and search for "Vanilla Fireflies". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

datapackfabricforgeneoforgequilt

Minecraft Versions

26.2, 1.21.6, 1.21.5 (+15 more)

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Vanilla Fireflies 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 (26.2). You can switch loaders with one click in the panel.

Is Vanilla Fireflies compatible with datapack and fabric and forge and neoforge and quilt?

Vanilla Fireflies officially supports datapack, fabric, forge, neoforge, quilt for Minecraft 26.2, 1.21.6, 1.21.5. 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 Vanilla Fireflies – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Vanilla Fireflies 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 Vanilla Fireflies with just one click on your server.

Recommended RAM
4 GBfrom €5.2/mo
Minimum 3 GB | per 8 players
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Details

License
Creative Commons Attribution 4.0 International
Server-side
Required

Supported Versions

26.21.21.61.21.51.21.5-pre31.21.5-pre21.21.5-pre125w10a25w09b25w09a25w08a+8 more