you can try this tool:
A program that let you set the opacity of your wallpaper.
I've tried for quite a while and now I'm wondering if there is no way to get a really transparent background on the A780 and a clean look on the wallpaper.
In wallpapersettings one can switch transparency on and off which results in the wallpaper image either being completly invisible or blended with the background color in menues and on main screen.
The only way to get a look at the real wallpaper then is to click on some free area on main screen, for then it is displayed until you click again.
In some tutorials about skins for motorola phones I have found the values BlendingColor and BlendingPercentage in the config files. However, these tutorials theme to be a lot newer than the A780 and it looks like these parameters are simply ignored by my phone.
Is there really no way to get true 100%-transparency on A780?
can it work on E6
It can work on a780/e680