Maintenance for the week of January 30:
• PC/Mac: No maintenance – January 30
• Xbox: NA and EU megaservers for maintenance – February 1, 6:00AM EST (11:00 UTC) - 9:00AM EST (14:00 UTC)
• PlayStation®: NA and EU megaservers for maintenance – February 1, 6:00AM EST (11:00 UTC) - 9:00AM EST (14:00 UTC)
If you have an Nvidia card in the 900 series or later (maybe earlier), there is Nvidia Freestyle. This is enable in GFE under "Experimental". It supports a number of games, including ESO, with nothing extra needing to be installed.
You setup a hotkey of your choice (I use Alt-Z) to access the menu in-game and see post-process shading and changes in realtime.