I have a las dataset the uses the NAD83CSRS UTM20 datum; elevations are ellipsoidal. I am trying to transform the data to the CGVD2013 vertical datum, but have been unsuccessful thus far. I have tried setting the output coordinate system to the desired datum in the Create LAS Dataset tool, but the output elevations are still ellipsoidal. Is there a known reason why this isn't working? Is there an alternative way to apply a vertical transformation to a las dataset? Thanks!