Terragen like any similar generator application usually seems to be easy to use but in realty most are not easy at all after certain level.
Your images seem to have athmosphere density or haze set too high making the images look like downtown LA. Also your Y-scale is way too big to create realistic looking scenery... Norway might have something looking like this but it's an exception.
You CAN have crisp and wonderful results though if you're pro enough:
http://lucbianco.free.fr/2bgal/serie.php?id_album=39&stat=ok
Your images seem to have athmosphere density or haze set too high making the images look like downtown LA. Also your Y-scale is way too big to create realistic looking scenery... Norway might have something looking like this but it's an exception.
You CAN have crisp and wonderful results though if you're pro enough:
http://lucbianco.free.fr/2bgal/serie.php?id_album=39&stat=ok