The Mushroom NPC needs to have a qualified house of about 6×10 in size (including doors, tables and chairs, artificial walls, and light sources, etc.). Mushroom furniture and wooden furniture are both acceptable, and can be matched with other NPC houses. There is no difference, but the house must be in a mushroom field environment on the ground before it can be moved in. Just add more silt blocks next to the room. The mushroom environment requires mushrooms to appear in the background, the light to dim, and the BGM of the mushroom field to appear.