(07-04-2014, 05:00 AM)kinkinkijkin Wrote:(07-04-2014, 04:45 AM)potate Wrote: Yeah. It reduces the jaggies.
No it doesn't. It, unfortunately, doesn't work like that.
Actually, it does do just that. Since you're using a source with a higher image quality (4x IR) you have more information to use when downscaling to 1080p vs 3x IR. The blending between edges will therefore be more accurate, giving them smoother appearances. This is NaturalViolence 101 stuff :p Anyway, you can test it out for yourself, but the thing is, the higher the IR (and IQ), the harder it is to perceive significant differences in aliasing reduction. So your eyes might not see an overwhelming difference between 3x or 4x IR when both are downscaled to 1080p.
I should highlight that raising IR, however, is still inferior to using AA methods like MSAA (for geometry only), or SSAA, or whatever fancy thing your GPU drivers can throw at Dolphin.