To change a window transparency I can set the opacity property:
xprop -f _NET_WM_WINDOW_OPACITY 32c -set _NET_WM_WINDOW_OPACITY 0x7fffffff
But instead of a "real" transparency that overlaps other windows I just need to see a desktop picture as a background. Is there any property that I can set with xprop to achieve this?
I am looking for a solution for xfwm window manager.