If I want to share photos as wallpapers, what is "best practice" in terms of what sizes to include and how to package / present?
That was the dense version. Now for a looser style
Wallpapers should fit the screen so things like aspect ratio don't get messed up. There are several common screen aspect ratios like 3:4 and 16:9 at several resolutions. In making photos available as wallpapers, what sizes should one prepare? Is it best then to tar/gz them all together? Does one need to add a script to install them in a new folder under /usr/share/backgrounds? What is the correct, Linux way to do this?