@minecraft/creator-tools/data/forms/client_biome/minecraft_fog_appearance.form.json

Minecraft Creator Tools command line and libraries.

{
  "fields": [
    {
      "id": "fog_identifier",
      "title": "fog_identifier",
      "description": "Identifier of fog definition to use",
      "dataType": 2
    }
  ],
  "description": "Sets the fog settings used during rendering. Biomes without this component will have default fog settings.",
  "title": "Fog Appearance",
  "id": "minecraft:fog_appearance"
}