In ZE, but I think it was the color I blended, not the terrain. So thank you , I think you have solved my problem. I'll blend the terrain, and I'm sure that will do it.
I'm a bit tired, so I wasn't really thinking straight.
Edit: That didn't work either, unfortunatley.
Edit 2: Got it working. I just had to change the ground textures in gimp, and then load the new ones with the sky2.lvl file. A big thanks to Mav, and Sky_216.