PSD file to make a SBDockBG2.png from your Wallpaper that's dimmed. This should make a Dock seamless from the background on homescreen.
*Wallpaper.psd - Drag your Wallpaper in between Dimming layer and Wallpaper image. Command+Click(mac) or Ctrl+Click(win) Dimming layer mask will make sellection and then Flatten Image. Go to Image menu>Crop and Save it as SBDockBG2.png.