Someone else posted this settings for hellfire (this is with my res of 3440 x 1440, hope it works with yours):
Display mode- 3440x1440 60hz
vertical sync- default
gamma- 1.0 (default)
anisotroopic- enabed - af 16x
antialiasing- msaa 8x
I have an ultrawide screen, 36 inch, and this works great for me. Much thanks to the person who posted these stats, i could not find his post.
i hope that's not stretched to fit because it would look super distorted on an ultrawide haha.