Viewed from the side, I'm trying to create a reasonably gentle slope with rocks protruding.
Click image for larger version. 

Name:	hill.jpg 
Views:	14 
Size:	7.3 KB 
ID:	91735
I'll have another go with the shadows, thanks. I just had a quick go to see what it looked like (and I'll need to check the light source to make sure it matches up with the rest of the map).