I've noticed the function of Full Browser Width in WD10 Premium.... which is working great for solid colour rectangles etc used in header + footer.

But I also have an image which I want to be full browser width. In older versions of WD I've had to rearrange the image in photoshop, making in 1500 px wide then chopping off 250px from one side and paste it on the other so when it's filled the browser as a background it's been full width and centralised.

In desktop mode full width is looking fine, but in the mobile version of the site is doing what older versions used to do and tiling the image so its repeating part chopped off.

What's the best solution to prevent the image tiling in mobile versions for phones with bigger screens? Is it to do something akin to the old solution? - or just make the image say 1000 px wide with fade out transparency and use that?