That’s why your house in Terraria is foggy. This biome has several different effects, one of which is the spawning of fog that increases in intensity as the number of gravestones in the area increases. The graveyard is a mini-biome that appears when five or more gravestones are close to each other. If your house is foggy in Terraria, chances are that gravestones are turning the area into a mini graveyard biome.
Luckily for you, though, I’ve figured out why your house is foggy in Terraria. You get home when suddenly you realize that your house is covered in fog.” Yeah, me too.
Does this sound familiar? “You’re going about your day in Terraria, having a jolly old time.