Here are a few examples of using the Picture Designer. After selecting the pictures, none of the compilations took longer than 30 minutes. The little ones (with a few pictures) have even been created by chance during programming.
Here is a variation on how to customize the Windows wallpaper. Short instructions can be found at Windows wallpapers (1)
A second background image might look like this. Again, I have created a short guide. Windows wallpapers (2)