struct
PersistentWorldAmbientSoundDefinition | Array<PersistentWorldAmbientSoundDefinition>trueMandatory if crossfade is defined.
PersistentWorldAmbientSoundDefinition | Array<PersistentWorldAmbientSoundDefinition>trueMandatory if crossfade is defined.
PersistentWorldAmbientSoundsDefinitionCrossfadetrueSemiPersistentWorldAmbientSoundDefinition | Array<SemiPersistentWorldAmbientSoundDefinition>true