Album art downloading has now be readded back to gmmp in alpha 10. The process should much easier to deal with compared to 2.x. Now all possible images are shown at once in an image grid similar to the album list view.
Text under each image will give more explanation. If the image is local to your device, it will say either "Current Image", "In Folder", or "Embedded" depending on where gmmp found the image. After that it will show various resolution images found online. Very large will be the full resolution, Large is 1000x1000, Medium 800x800, and Small is 600x600. Select a new image for the album and the rest of the UI will update to reflect the new album art.
Another significant capability added in Alpha 10 is the ability to set the top level view used for smart playlists (referred to in the UI as "group by". You can now set the top level to be Album, Album Artist, Artist, Composer, Genre, or Track.
The following images will show the same smart playlist, but with different "group bys" chosen. One thing to note is the "order by" only applies to the track list, the other top levels will be sorted by the sorting options in the toolbar.
3.0 Alpha 10 (06/21/19):
New:
-Added album art selector
-Added sort menu to smart details
-Added album art preloading for album lists
-Added 'group by' option for smart playlists. This sets the top level when viewing the playlists
Changes/Improvements
-New smart playlists will default to matching all rules
-Improved preformance on actions involving a large number of tracks
-Changed a lot of the internal handling of album artist so please report any album artist related issues if they pop up
-Improved search performance
-Removed crossfade when loading images in album list views
-Improved image caching
-Album Artist list sort/view mode is now separate from the Artist list view
Fixes:
Fixed library tab menus not loading correctly
Fixed sorting by album artist in smart playlists
Fixed crash in the search ui
Fixed list items refreshing when unchanged
Downloads: