Attached Link: http://homepage.ntlworld.com/byallassyde/seamless_tex.html

If your having problems getting rock to look right then use real rock. Click the faq'a up there and go down towards . Forget that I'll find the link for you... Go here and grab the real seamless rock textures. There real big so they will work really well but you got to make a bump channel also using the same texture. But it's easy you just load the same picture in the bump channel spot. You can also add more bump channels to the picture to make it look extra course if you want. You need more polys in your hills. Load them in the terrain editor (edit terrain) again and turn up the mesh to 512 X 512 or bigger but don't go too nuts.