Dual Monitor: Diff Wallpaper Per

This is not really a clean solution but there is a way to get the two screens to show different pictures.

merge the two wallpapers you want to use side by side. e.g. if your monitors are each at 1280*1024 resolution, take two 1280*1024 images and merge them to a single 2560*1024 image.

Set the image as desktop background and set "position" to "tile".

*If you have two different resolution monitors this might not work very well. I have never tried it.