I suppose she's playing Elite Dangerous: Reshade, version 3.0.
I've just made the switch from the "old" EDFX/Reshade 2.0 to Reshade 3.0...still fiddling with the gazillion shaders and sliders available, but the results you can get, from subtle to eye-popping amazeballs, are always worth in my opinion, hard to play again vanilla after that:
https://i.imgur.com/n0NoBG3.jpg
https://i.imgur.com/1M5rXeU.jpg
There also the 4K resolution adding to the beauty there, but I hope you get the point.

Also mind (but you really shouldn't with a 1080Ti) that effects can get a bit heavy on resources, where you see those 25 fps in the first screenshot, I was actually making around 45 with Reshade disabled (GTX 1060 3GB, everything on ultra).
- EDIT -
Adding something a bit more gratuitous.
https://i.imgur.com/wjMPcTD.jpg