There are several new Terragen presets are available in the store section:
Quiet river water pack you can use to add realistic color water shader in your scene, several types are provided like transparent or muddy water.
Canyon 6 scene which show you how to setup stratas canyon scene which realistic displacements. Complete scene is included which all shaders (no vegetation).
Fog layer preset with 2 types of fog, one is very detailed and compact, second one is more diffuse fog.
Deep valley scene is a complete and very versatile valley environment with a lot possibilities of virtual excursions and reuse.
Sky preset 2 with 4 clouds layers at different altitudes that you can enable/disable depending on cloud sky coverage you would like to obtain