The underground Glowing Mushroom Biome is a biome that has many Glowing Mushrooms and glowing mushroom trees in it. These biomes are fairly common underground and have a larger size compared to some of the minor 1.2 biomes such as the Spider Nest. This biome is the only place to get the Mushroom Grass Seeds which you need to make a Surface Glowing Mushroom Biome for Truffle the NPC.
The following is a list of the monsters that are exclusive to the Glowing Mushroom Biome:
- Spore Zombie
- Fungi Bulb
- Mushi Ladybug
- Anomura Fungus
- Giant Fungi Bulb (hardmode)
- Fungo Fish (hardmode)
- Truffle Worm (hardmode, non-aggressive)
- Glowing Snail (non-agressive)
Surface Glowing Mushroom Biome
The Surface Glowing Mushroom Biome is a biome that can be created on the surface of the world by planting Mushroom Grass Seeds in mud, allowing it to grow. It's unknown whether it can occur during world creation. The Surface Glowing Mushroom biome will grow above and below sea level. Once part of the surface is converted to a Surface Glowing Mushroom Biome, stars will come out and the sun will disappear (even during the day).
The Surface Glowing Mushroom Biome is similar to the underground Glowing Mushroom biome, but on the surface it has different, more tree-like mushroom stalks. Acquiring this biome and being inside of it changes the background to a forest of giant glowing mushrooms. Be warned, however, as this biome will spawn some of the hard mode Glowing Mushroom Biome enemies into it if you are in hardmode, and some can be tricky to defeat. Even if you are not in Hardmode the enemies in a surface Glowing mushroom biome are stronger than most enemies. A house built on a Surface Glowing Mushroom Biome is necessary for the Truffle NPC to spawn.