Anti-aliasing FXAA effects on gta 5 image HD

This video shows how anti-aliasing works. It tries to smooth the jagged lines that appear on a diagonal line in games. A purely horizontal or verticle line will always look perfect but the resolution will show up with diagonal lines and look like stair steps. Here is the proof of the changes applying FXAA on jagged lines can do to improve the appearance. FXAA is the least deterimental to any frame rate loss, while MSAA will hit you pretty hard with lower frame rates.