I have looked at every set up guide I can find. I have chosen the albums, etc to share. My homeshare is on. I can get netflix and play my itunes on my tv, but whenever I try to put a slideshow on, the photostream says that there are no photos in this album. Very frustrated!!
Rudegar, the link you present here is all about PhotoStream. And PhotoStream is related to iOS devices only.
The Apple TV is an iOS device
So my conclusion is that there is no direct way to use Apple TV to show photos on your Mac/PC. Sad, but true...
iTunes > file > homesharing > choose photos......, then on the Apple TV > computers > photos.