Vanilla Fireflies Data Pack FAQ
10 questions players actually ask, answered.
How do I turn on fireflies after installing the data pack?
Fireflies spawn automatically in swamp and mangrove swamp biomes at night once the data pack is loaded. If you don't see them, check that the data pack is enabled in your world settings and that you're in the correct biome after sunset.
Can I change how many fireflies appear?
Yes, run the command `/function vanilla_fireflies:menu` to access customization options where you can adjust the spawn rate of fireflies in your world.
Do fireflies only spawn in swamps?
Fireflies spawn in swamp and mangrove swamp biomes. They will not appear in other biomes, even if you customize the spawn settings.
Why aren't fireflies showing up in my swamp at night?
Check that the data pack is enabled, you're in a swamp or mangrove swamp biome, it's nighttime, and the area has loaded properly. If fireflies are still missing, try running `/reload` to refresh the data pack.
Can I catch fireflies or do they serve a purpose?
Fireflies are ambient creatures that add atmosphere to swamps at night. They cannot be caught or used as crafting ingredients—they exist purely for visual ambiance.
Do fireflies affect performance or lag?
Fireflies are lightweight ambient entities designed to have minimal performance impact. If you experience lag, try lowering the spawn rate using the customization menu.
Will fireflies work with other mods or data packs?
Vanilla Fireflies Data Pack is designed to work with most other mods and data packs since it only adds ambient entities. If you encounter conflicts, check load order and ensure no other packs modify swamp biome spawning.
Do fireflies despawn or stay in one place?
Fireflies are ambient mobs that fly around naturally in their spawning areas. They will despawn if you travel far from the biome, similar to other ambient creatures.
Can I see fireflies during the day?
No, fireflies only spawn and appear at night. They will not be visible during daytime in swamps.
How do I remove or disable the data pack?
Go to your world settings, find Vanilla Fireflies Data Pack in the data pack list, and click the arrow to move it to the disabled section, then save.