I've got two monitors side by side and I'm trying to span large wallpapers over them. One is 4K, other is 1440p and the DPI difference is big enough to cause the wallpaper have noticeably different scales on the monitors. Can I somehow scale down the wallpaper size on the second 1440p monitor to achieve the same scale on both of the monitors?

I tried to play around with the built in scaling adjustment without great success. If I'm using best fit with clipping it'll make the wallpaper smaller than the display area if I try to scale it down, even though the wallpaper should be large enough to accomodate the adjusted scaling.

Is there a way to do this correctly?