WEBVTT

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you guys have been asking for this fastest Possible episode for the better

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part of a year so I guess it's time to deliver for starters if you don't know

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what anti- aliasing is at all yet or you

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need a quick refresher please check out our overview video here or if you've

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disabled annotations then use the link in the video description moving along

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all methods of anti-aliasing fall into one of two groups the first increases

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the sample rate which means it renders the scene at what is effectively a

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higher resolution than down samples to the display res solution effectively

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smoothing lines and the second blurs edges or other contrasts due to shading

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and textures and is known as post AA or postprocessing since the blurring occurs

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directly after the render process msaa

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and ssaa both fall under the first category super sampling anti-aliasing

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also known as full scene anti-aliasing or fsaa was the first type of AA

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available with early video cards it is best used on photorealistic images as it

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makes them appear softer and more lifelike but for line art or diagrams it

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actually decreases the quality and makes them appear fuzzy especially for

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horizontal and vertical lines ssaa has a

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huge computational cost so most real-time applications like games have

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moved away from this method typically fsaa goes up to 4X but if you have

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horsepower to spare there's a modified version for SLI users which can crank

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the sample rate up to 16x or even 128x

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if you're running running quadros in SLI just in case your neck gets tired and

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you want to put them in your computer or something msaa or multi- sampling

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anti-aliasing is similar to fsaa but it

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only super samples the edges of polygons

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and calculates textures once per pixel which significantly cuts down on the

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required processing power the main downside however is that it doesn't

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prevent aliasing that appears within rendered polygons caused by blending

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textures or pixel shaders after a few more advances in super sampling

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techniques CSAA or coverage sample anti-

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lasing was released along with the GeForce 8 series graphics cards from

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NVIDIA It produced images that rivaled the quality of 16x msaa while only

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causing a slightly higher performance hindrance than 4xmsaa it accomplished

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this by simply detecting whether or not a polygon is present and then using that

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information to judge where it needs to use super sampling so let's move over to

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the second type of ant saying post AA or postprocessing a great example of this

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is FXAA or fast approximate anti-aliasing this technique was

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developed by Timothy Lots under NVIDIA it gets rid of jaggies or Jagged edges

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by smoothing the edges on each pixel on the screen directly after each pixel is

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rendered including those in Blended textures and pixel shaders the smoothing

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directly after pixels are rendered part is huge as most anti-aliasing techniques

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have to analyze a 3D model as a whole to smooth the edges rather than smoothing

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each pixel individually FXAA judges where in edges by comparing the depth

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between two pixels and smooth their edges according to their relative depth

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unfortunately this technique does make some textures appear soft and must be

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applied before heads up display elements are rendered so that they remain sharp

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and clear FXAA was such an improvement over previous techniques that Kotaku

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actually claimed that FXAA made all previous forms of anti-aliasing obsolete

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with its speed and accuracy NVIDIA has also since added txaa or temporal

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anti-aliasing which is a film style anti-aliasing technique designed to

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reduce temporal aliasing crawling and flickering scen in motion when playing

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games and this is a very complex form of AA which combines down sampling and

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blurring it uses a lot more performance than FXAA its implementation differs

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from game to game and it's only available on gpus from the Kepler family

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or higher well Linus you might be saying

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this is all well and good but what if I'm a member of team red or what if my

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graphics card doesn't natively support some of the AA methods you've mentioned

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in this video well that's a great question not every graphics card has

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native support for each method of anti- eling but you can usually add one in

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yourself it won't always work as easily or as well as a developer implemented

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solution but you can actually download plenty of drivers that will add in

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anti-aliasing techniques some of which are more advanced than what the

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developer may have added one such solution is SMA or subpixel

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morphological anti-aliasing this combines morphological anti-aliasing a

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post-processing technique that identifies aliasing based on patterns

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and blends colors around them to diminish that aliasing with super sampling like msaa or SSA AA to sharpen

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the entire Scene It is natively supported in some games and many users

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have seen Market improvements in visual quality when adding SMA to games like

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Skyrim many of them claim that it provides the smoothness of FXAA without

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the performance hit but of course your mileage may vary so there you have it as

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usual it comes down to personal preference and you'll want to do some experimentation to see what works best

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for your eyes on your rig in your games

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happy fragging speaking of fragging linda.com well I guess linda.com can't

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really help you with fragging but they can help you with a wide variety of other skills they have thousands of

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expert so you know that the information provided is correct and relevant whether

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you want to learn about programming photography or video editing so you can create awesome content like what we

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release Here on Techquickie although if you compete with us we'll come and we'll

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cut you uh linda.com has you covered you take each course at your own pace so

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whether you're breezing through four lectures a day or only fitting in one a

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week you can expand your knowledge on your own schedule plans start at a very

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reasonable $25 per month which is less than a dollar a day for all you math

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wizzes out there but if you want to try out linda.com completely free they're

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offering a 7-Day trial to All Techquickie viewers so head over to

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linda.com tequ to check that out guys thanks for watching like if you liked

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dislike if you dislike leave a comment if you have suggestions for future fastest posses and as always don't

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forget to subscribe