Backgrounds look too sharp
I'm not sure if this is a Shell or a Mutter issue, but background images look too sharp. I have a pretty sh*ty screen with 1366×768px resolution and any bigger image (ex. 6000×4000px) looks quite bad (see screenshot). Even the default GNOME background...
P.S. I'm not 100% sure, that it is clearly visible on those screenshots. The original image for comparison: https://unsplash.com/photos/us_LOktU5lA
EDIT: Same machine, same wallpaper, Ubuntu 16.04 with Unity for comparison:
