Heres a easy way to do it in Vue and Photoshop
In vue, create a terrain--512x512 or higher
Use the Canyon filter a few times to create plateaus
Use the Diffusive filter and hold it down for a LONG time to smooth everything over.
Click ok and in your working window lower the height of the terrain a little---maybe about half of its original height
now go to the video link below to make the road on the terrain
http://www.geekatplay.com/flvplayer/pla ... uegarypathLemme know if you need more