Dunno which version of Vue you're using, but there is a good explanation in the Vue 5i Terrain modeling section. Basically, you make a grayscale square, "power of 2 size" (512 X 512 or 1024 X 1024) picture, looking straight down on your terrain. Paint the whole thing with RGB 128/128/128 (mid gray). Now, wherever you want something to stick up, you make it lighter. Where you want to dig down, you make it darker. So you just paint a terrain. In the Vue Terrain Editor, you import your picture. Then you can use just that or mix it in with a Vue generated terrain. After that, you can expand or compress your terrain to get the scale you want, either in Vue after you leave the Terrain Editor, or using tools in the Terrain Editor. Do 2 or 3 quick sketchs first, to see who it works and get used to everything - before you spend a long time on a finished terrain. You can also import height maps make by other terrain building apps, like Terragen or Bryce. Look in the "Backroom" of this forum and search Google, there is prolly a step-by-step tutorial.