Win 10, Multi-Monitor Wallpaper Help

[shovenose]

I've spend the past 15 minutes fiddling with wallpaper settings to no avail.

I have three monitors set up like so (see attachment). Monitor 1 is on top then 2 and 3 on the bottom. 1 is centered over 2 and 3.

I want the top one to have a solid black background (which I can do using a picture, that's fine, since Windows will only let you use solid color mode or picture mode not both) and I want one ultra-wide image spanned across the bottom two monitors. Unfortunately, span mode includes the top monitor.

I'd prefer to avoid third-party software, but I have a license for DisplayFusion somewhere if needbe. Just hoping I can do this with Win10's built-in stuff.

Thanks!