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Old 16-03-2014, 09:24   #1
Jonno394
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Downsampling

Just wondered whether anyone here has dabbled with downsampling using their graphics cards?

Quote:
What is downsampling

Downsampling, also called OGSSAA : Ordered Grid SuperSampling AntiAliasing, is in this case the concept of rendering the game at a much higher, custom made, resolution than your monitor is capable of displaying and subsequently having the GPU rescale the image ( as in downsample ) to that of your monitor's native resolution to which the end result is a "cleaner", sharper and less aliased image.


Why

King of all AA methods, affects virtually every kind of aliasing but it's also very taxing which is why we have other less demanding alternatives, SMAA, MLAA, FXAA etc. Sadly we are in a position where we have pc-games shipping with "AA on/off" options or have AA implementations that leads much to be desired making people use other forms of externally forced AA.

We're also at a point in this "generation" where the discrepancy between pc and console hardware is bigger than ever giving pc-users a much larger performance overhead. What I mean by that is that there are a lot of people out there with hardware that can run many/most new games and virtually any older game at higher resolutions than 1920x1080 while still maintaining an acceptable framerate even though 1920x1080 is still the standard resolution of most of our monitors.

Using downsampling you almost never will have to worry about a game's image quality being ruined by lack of AA since it works in almost any 3D game out there. Compared to other types of AA solutions like SMAA/FXAA-injectors or "Nvidia Inspector AA" you won't need to fiddle with settings or files at all, when it comes to downsampling via custom resolution once you got it up and running it's just a matter of using that resolution in any game and presto you got yourself some AA brewing. It is worth pointing at that downsampling still works great with those aforementioned AA methods ( injectors, inspector etc ) and whatever kind of AA solution/s the games you want to play offer, you can mix,match and stack AA to your heart's content.
Came across it on neoGAF here and was interested in trying it out, but not bothered yet.

People have been downsampling from a 4k resolution and some of the images are stunning to say the least. Not sure y system could handle that but might try downsampling from 1440p at some point.
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Old 16-03-2014, 12:16   #2
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Fallout 3 would be an ideal game for you to try this with Jonno.

I haven't tried it yet as my monitor is 1440p native and depending on how demanding a game is I either use 1080p or 1440p.
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Old 16-03-2014, 12:44   #3
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Yeah i was thinking a less demanding game to start with so good shout. You could always try down sampling from 4k...
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