There is a good Procedural Terrain tutorial for sale at Cornucopia 3D. It runs inside the Vue 5 Infinite help system, so you can work alongside it. Might even be from the artist that did that scene - looks familiar.

I find that i usually have to scale down the vertical size of terrains from Vue, after they are out of the Terrain Editor and incorporated into the scene.

The Vue Function Editor is a fantastic creative tool - bringing much of the power of 3D programming to the non-programmer. It's well worth the effort of learning, IMO. 

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