Hello again. So I've decided to make a mod with its own world space. I already have a heightmap image and tested it out in the GECK, but I keep getting very spiky and impossible-to-traverse mountain ranges. I've grayscaled the image many times but it doesn't want to generate properly. Could someone help me out, or possibly generate this heightmap for me?

This is the image I've been trying to make a heightmap of:

http:// i59 . tinypic . com/2igbzgg .jpg

(remove spaces)

As you can see, there's some pretty mountainious terrain on it, and I do want mountains, but I need the areas around the mountains to just be sublty bumpy. Could someone please help?