Hi :), I am trying desperately to make this program work. The original program: http://www.javaworld.com/javaworld/jw-08-1998/jw-08-step.html?page=2 works fine. When I tried to implement it in VB the whole thing works except there are no macroscopic features - as you can see its just rough between between points but there are no hills, plataus etc ... Your help is appreciated. Thank you. My VB code is here : http://freetexthost.com/cw0w53qqln" [Broken] This is what i get (zoomed-out image): http://img517.imageshack.us/img517/8379/95166269.jpg [Broken] Ive tried changing the value of the rough variable - everything between 0.1 to 0.99999 without success.