laytheme background image is too zoomed in

[Theodoros]

Hey

I'm trying to have a fixed, well centered, filling background image.

In the "customize" menu it looks good, but horrible when i go live.

imgur link
imagesgibellina.it

I tried all the 3 settings but it doesn't change. What's the css class and how can I change it?
Thanks

[Richard]

Dear @Theodoros

There are two images, one used for Desktop & one for Mobile
The CSS for the desktop background image is:

#grid .background-image img{
   // insert your code here //
}

And for the Mobile:

#custom-phone-grid .background-image img{
   // insert your code here //
}

Hope this helps @Theodoros :)

Best
Richard