You can choose your Google Photo Albums to be displayed on your TV's screensaver. Follow these instructions to set this up Connect your mobile device to the same network as your SHIELD Using the Google Home app on your mobile device, select the SHIELD device you want to set up On the upper right, select the settings icon (gears) Under "device features" select Ambient mode Select.. Photo gallery and screensaver works pretty well, with thousands of pictures (from a NAS folder mounted on the shield) randomly picked. The one thing bothering me is that the app occasionaly fails to parse the year of a picture correctly, which messes with the album sorting.
Sleep Timing and Screen SaverYou can set up a screensaver for your SHIELD TV that displays photos and colorful designs. Daydream uses a collection of scenic photos.. A screensaver for Android/Google TV devices and phones including Nvidia Shield, Fire TV, and Google TV Streamer. Inspired by Apple TV's beautiful video screensaver! Please read if you have an Nvidia Shield or a recent Google TV device.