I am having a problem plotting images/aerial photos with my line work. When I plot, my lines get chopped up when ever the plot gets to an area that has trees or a darker grey in the photo. The image is always sent to back and everything else is sent to front. I have noticed that it seems to plot all lines fine that are color white. Is there a solution to this problem? I am using a HP 800 Design-jet. Any ideas would be helpful.