I think it would be great if you added some kind of filename filter to the Folder selection in wallpaper sources.

I download all of my wallpaper to a single directory. Sure, I could subdivide it into more subdirectories, but I'd rather not.

Most of the filenames use a pattern that describes their size, so that would be useful to avoid extreme scaling. I might also like to exclude png files, or maybe use only png files, depending.

I was just wanting this today because whenever DP selects one of the Digital Blasphemy uncompressed lossless PNG files, which are about 50 MB each, it has a large lag while it downloads it from my NAS and resizes the file.