hologram.cs

 public class TextEntity : Entity
 {
	public TextEntity(Level level, string text, Vector3 pos) : base(64, level)
	{
		NameTag = text;
		KnownPosition = new PlayerLocation(pos);
		HealthManager = new NoDamageHealthManager(this);
	}

	public override void OnTick()
	{
	}

	public override MetadataDictionary GetMetadata()
	{
		var metadata = base.GetMetadata();
		metadata[15] = new MetadataByte(1);
		return metadata;
	}

}