With what hiccup and I have been discussing in the previous few posts, I have worked out that the Gallery element only recognises tags="artist".
It doesn't read the track values for tags="composer" or tags="conductor".
The ArtistPicture element allows "Composer" or "ComposerPref" but that element doesn't accept interval or refreshInterval. It only changes on new tracks.
So could support be added for the
hard-coded set of names
that "Gallery" could display images for please.
That's probably Composer, Conductor, AlbumArtist, GuestArtist and Remixer.