DigReal, I am desiring to work on a more complicated scene.. but I narrow down some problems to what I am finding now.. oddly enough I had better luck last night for some reason. One possibility, I accidently tilted my terrain and then do an undo on it. Is it possible that cause the problem. I could upload the scene to my FTP, but I planned to watch 24 recorded on my Tivo right now. DMM, thanks for you help.. Stewart