Well two ways work
1 is to use the custom resolution option I the renderer and set it to 5760 X 1080
With a fov of 130. I then used fraps with no overlay for screen shot. For some reason xp10
Wont use the correct resolution.
2. You can you nvidia spanning mode or eyefinity not sure as I only have nvidia
And then use fraps in the same aspect.
Using spanning mode or eyefinity will limit your resolutions as the gpu has to
Virtually stitch them together while using custom resolutions creates the xp
Windows from the primary screen and the enlarges to the right as you widen.
I find the latter to be beneficial with non conventional spanned resolutions
Normally I would get stuck with 3072 x 768, 3840 x 1024 and 5760 x 1080
though I could use bezel correction with spanning or eyefinity. It's a trade off
really
Non spanned
Spanned
Same result in the end BUT you cant do resolutions like
5040 x 1050, 4800 x 900 and so forth.