Under Gnome, you have the option to span wallpaper across multiple monitors, and I'm wondering if KDE has a feature or if there is a program that does it. Thus far, I've only been able to come up with the solution of manually editing the file in gimp to the given proportions of my monitors and then splitting /saving it as two files, one per desktop. It's a bit tricky to do this however, and often results in disorientation one way or the other like so -- http://i.imgur.com/Hc1yNx0.jpg