Incognitas,

You want to do a sand dune using a terrain? - I don't know about the Daz thing, but it shouldn't be too hard to do.  And images of sand are easy enough to come by.  But I wouldn't use such an image to drive the terrain, I'd just use it as a material, and for the bump.

Measure your mind's height
by the shade it casts.
Robert Browning (Paracelsus)

Fran's Freestuff

http://franontheedge.blogspot.com/

http://www.FranOnTheEdge.com