You'll probably need to push the Anti-aliasing as far as you can to reduce the jagged lines.
I tried to make some screenshots with different settings, but they looked different in GPL and all the same in the resulting screen shots.
For me, using:
AF = 4x
AA = 32xS
Texture Filtering Negative LOD Bias = Clamp
looked the best, but there wasn't a huge difference between them all.
It's possible that your card won't have all those options available. I use an nVidia GTX760.
Edited by Bob Simpson, Jan 10 2015 - 11:47 AM.