what is fences.ni.exe and what does it do?

I notice that when fences is enabled, it draws my wallpaper, with the fences I have configured, on top of any other wallpaper, such as, for instance, the wallpaper that Windowblinds changes for me every hour. When I turn off Fences, that wallpaper pops back up.

I went looking for a possible explanation and can't really find it. I'm sure Fences looks somewhere in my wallpaper folder and chooses a picture to use, but that picture does not change on the regular basis I want, and I can't find out how to tell Fences NOT to change my wallpaper.

Help would be appreciated. I think Fences would be more stable also if it didn't have to draw the wallpaper all the time.