Finally bought World creator, below is my first attempt at a terrain created with it. Do like the extra control and the ability to sculpt the terrain, though not that impressed with the texturing, I prefer to do it in terragen, though creating splat maps and making them into masks is quite useful. I have tried exporting simulation maps for erosion, but apparently I've not got enough memory for the size I'm doing so not sure if there's a work around. (If anyone can help let me know)
Anyway a quick render. 2 textures base colour on the mountains, and a sand surface layer (can never get the right colours for sand) created, with a power fractal with low feature settings to get more of a noise appearance