Randomised slideshow for photos

[mal1982 1]

I am using Emby on my XBOX ONE, Fire stick and used to use the Windows Media Center version on my PC. I now have my PC purely as a server with no screen attached and the only functionality of my old WMC that I am unable to replicate in Emby or other XBOX ONE or Fire apps is a randomised photo slideshow. All apps including Emby just seem to give you the option to play one folder in a linear order (name, date, etc). What I would really like to be able to do is to just have it playing in the background and randomly cycling through all photos, or a particular folder (+ subfolders).