Pretty much same as monitor fading but only when an app goes fullscreen.

Monitor fading is really useful but it's way too glitchy and it's flicker a lot, this option will actually make it must have for anyone with more than 1 monitor.

Why do we need this?
Picture this, you got your 2x monitors + TV connected to your PC, you open up VLC or whatever, you click on fullscreen and BEM u got 2 projectos under your TV which blasting you with radioactive light. D:

Now picture this, you got your 2x monitors + TV connected to your PC, you open up VLC or whatever, you click on fullscreen and BEM the monitors dim themselves and you can enjoy your spooky movie!

Also it's great for games, since you don't have to toggle it on and off all the time (and yes u can set up a function for each game but ain't nobody got time for that)

But monitor fade already does that!
Not really............Well ya but it does that all the time for windows or monitors which are way way less useful then fullscreen.
And again monitor fade is all over the place, diming displays left and right and goes kamikaza when you click on the taskbar...

In the current state monitor fading has great potential (actually it's probably the most useful feature of DisplayFusion..)
But it's useful ONLY when you don't need to multitask, which is pretty much when you game or watch something (only when fullscreen is active..........).

Annnnnnnnnnnnnnd...... the flickering makes it super annoying, why it's not just diming slowly?

Conclusion
We(I) need this, and it would be very nice if you were to change the dimming transition from constant to linear or even better, S curve\smooth and let us set the transition time.