Automatically fades out the full interface (UIParent) after a period of no interaction for an immersive experience. Entering combat, casting a spell, using an ability/item, typing in chat, or mousing over any UI element will fade the UI back in. General movement (flying, riding a mount or taxi, or walking around) will not fade the UI back in.
Full configuration of fade levels, delay times, and fade durations are available through the Interface options, or through the /ifade or /immersivefade slash commands.
By default, excludes the standard minimap from fading, and opening most default Blizzard frames will prevent the UI from fading out. Other frames can be added through the Interface options.
MIT