I'm having a problem editing landscapes in the creation kit. I've created a new worldspace for a mod I'm working on but for some reason I cannot edit the default terrain. I've tried using the drawing mode in the landscape editor but it has no effect. I can't even change the texture. I've looked all over the web to find an answer to this problem with no luck. There are no tutorials on this subject and the wiki is pretty much completely useless. Has anyone else had this problem and if so what did you do to fix it?