@karlh I use MMM-ImagesPhotos to display pictures on mm from my Linux file server, effectively my NAS.

my Linux server shares using samba (windows file server), and I mount that as a folder on my SBC. (see /etc/fstab)

this module uses a fixed name for the source of the files, so I use a file system link tosp that to the mount. (see ln command)

I display the images as background