What Is Anti Analising!?

[commando]

Hi What is AA??

you see i have a Radeon 9800XT 256mb.

And i can turn it on and off on Farcry...But when it is on and when it is off i don't see where the different is!?

what is it?

thanks

(i did search)

 

[Letters]

Anti-aliasing doesn't really work that well on ATi cards in Far Cry... it's supposed to smooth out jagged edges.

 

[nw909]

Depending on how high you set your AA it will remove the jagged edges on things in games.

FarCry's AA doesn't work for ATI cards.

 

[Mother]

I could go for the technical explanation (having just sat an advanced graphics exam), but that'd make me look like a fool.

Aliasing is where you get jagged edges along polygons due to the low rendering resolution of a video card. Anti-aliasing allows your graphics card to minimise the amount of jaggedness you see (by super sampling or other methods).

 

[Sgt.Igneri]

ahghhhh nvm.

Far cry is f00ked up with AA. If you use catalyst 3.9 drivers and enable AA in game but keep it off in ati control panel it usually works.

 

[63]

yeah, look at his rank, he's a prowler! he should know!

 

[ShaithEatery]

i got fx 5900 and my aa works great in farcry :cheese:

 

[Letters]

I have a 9600 and Far Cry runs, overall, like shit. Haha... they had better be optomizing! (I hear the MP beta runs great, though? I dun get it.)

 

[Shuzer]

i got fx 5900 and my aa works great in farcry :cheese:

..that'll be about the only thing that works great with that card lol

I have a 9600 and Far Cry runs, overall, like shit. Haha... they had better be optomizing! (I hear the MP beta runs great, though? I dun get it.)

I'm in the same boat as you, Radeon 9700 and it doesn't run too well. 20-30FPS average, 40+ indoors/some of the jungles
Others with a similar system to mine have reported good performance, as well as bad.. it's kinda funky, runs well for some, poorly for others

 

[staddydaddy]

Umm I have a 9800 pro 256mb and I have all the settings turned up, AA to max, 1600X1200 and I get about 18 fps. AA works fine for me but i think i have 3.7 cat's

 

[qckbeam]

Umm I have a 9800 pro 256mb and I have all the settings turned up, AA to max, 1600X1200 and I get about 18 fps. AA works fine for me but i think i have 3.7 cat's

Turn the settings to high instead of very high. The difference in quality is barely noticeable, and you will gain performance. Also, why do you have AA on at 1600X1200? AA is a performance sucker and is really only needed at 1024X768 and below. AA plus 1600X1200 is overkill mate

 

[RoyaleWithCheese]

Thread: What Is Anti Analising!?

Am I the only one who found this spelling funny?

 

[qckbeam]

Am I the only one who found this spelling funny?

hehehehe, didn't notice that

 

[Blad3]

AA and AF are more fashion accesories than necessities - it's the full detail, graphical technology (i.e. DX9), high resolutions and FPS that are important. Although AF and AA make nice touches to already high detailed graphics.

 

[dawdler]

Anti-aliasing is the term for methods of reducing the jagged edges that occur when 3D images are rendered. AA comes in two flavors (that I know of): super-sampling (aka Fullscreen, or FSAA), and and edge sampling. FSAA means the computer renders an image at much higher resolution (say 1600x1200 if you're screen resolution is 1024x768) and then compresses it for the actual display. Edge sampling does a similar thing, but only applies it to the edges of polygons, which a) leaves textures untouched, and b) can go ridiculously high (16x edge sampling as opposed to 4x FSAA) at the same performance level as a much lower FSAA sample size (4x means 4x larger pre-image).

The only card that I know of to support edge sampling was the ill-fated (and bad performing) Matrox Parhelia, and almost all cards just use FSAA.

FSAA isnt just supersampling... ATI can only do multisampling for instance.
I aint a big enough tech geek to care though, it smooths the pixels and higher X means more smoothing passes at higher perfomance cost, that's all I know and care about

Edit:

AA and AF are more fashion accesories than necessities - it's the full detail, graphical technology (i.e. DX9), high resolutions and FPS that are important. Although AF and AA make nice touches to already high detailed graphics.

I can agree that AA is *really* neccesary (although after I bought a 9700 Pro I tend to get nauscious without it, the screen is constantly jaggy and rough, and its shimmering ALOT), but AF *IS* a neccesity. Higher resolution doesnt help this.

 

[crabcakes66]

as i said in another thread.....if you play quake 3( COD) ..then a 5900 is a great card....

 

[Arno]

The only card that I know of to support edge sampling was the ill-fated (and bad performing) Matrox Parhelia, and almost all cards just use FSAA.

As far as I understand it, it's the other way around. The AA modes in most modern cards sample just the edges. If you want smooth textures, you use Anisotropic Filtering. It's way faster then full screen supersampling and works just as well.

I'm in the same boat as you, Radeon 9700 and it doesn't run too well. 20-30FPS average, 40+ indoors/some of the jungles

A friend of mine has a Radeon 9700pro. He gets 30-40FPS with "Very High" detail and is happy with it. I don't think the CPU matters that much in Far Cry, but lots of RAM (512MB and more) is definitly a plus.

 

[PvtRyan]

Anti Analising is what the nazi's did, they didn't really like gay people.

But if you mean anti-aliasing it smooths out edges using this method (correct me if I'm wrong): 4x FSAA means that each pixel gets split up into 4x4 pixels, just rendering at a higher resolution really. But then the game takes those 16 new pixels and calculates the avarage color of those pixels put together, and that will be the final color of the pixel.
The algorithms are probably much more advanced than this, but I believe this was the general explanation.

 

[Arno]

With 4xAA, every pixel is composed of the average color of four sampling points, not sixteen. Modern cards don't do this on every pixel, but only on the pixels at the edges of the polygons.

The reason why ATI 4xAA looks better then Nvidia 4xAA, is because ATI hardware positions the four sampling points in a better way, which leads to a better average color. At least, that's how I understand it.

 

[dawdler]

With 4xAA, every pixel is composed of the average color of four sampling points, not sixteen. Modern cards don't do this on every pixel, but only on the pixels at the edges of the polygons.

The reason why ATI 4xAA looks better then Nvidia 4xAA, is because ATI hardware positions the four sampling points in a better way, which leads to a better average color. At least, that's how I understand it.

ATI uses a rotated grid and Nvidia uses an ordered grid, and yes the rotated grid is better.
4x ATI actually has 4 times more accuracy that 4x Nvidia because of this. 2x vs 4x yeilds a roughly equal quality due to the equal accuracy (a little worse for 2x ATI in *theory*, but not by much).

 

[SpuD]

Am I the only one who found this spelling funny?

i did too!

 

[staddydaddy]

Turn the settings to high instead of very high. The difference in quality is barely noticeable, and you will gain performance. Also, why do you have AA on at 1600X1200? AA is a performance sucker and is really only needed at 1024X768 and below. AA plus 1600X1200 is overkill mate

Yeah, I just wanted to see how my system would handel with very demanding rendering. I dropped the settings down and Now the shadows on my gun models looks kinda blotchy. They looked like real shadows when I had everything on High.

 

[SubKamran]

Um, maybe he really wanted to know what "anal"ising is, not "alias"ing.

 

[qckbeam]

Um, maybe he really wanted to know what "anal"ising is, not "alias"ing.

well in that case let me explain........well, maybe it's best left to PM's or something

 

[Letters]

Mmmmm... I'll smooth out YOUR edges! :naughty:

 

[clarky003]

Does the AntiAliasing simply blend the pixels on the edge of the objects to make them appear smoother..., if so , no wonder it takes up so much extra proccessing power, all that blending,,

PS: are these top of the range ATI cards worth the hype there surrounded in, just to specificly play 1 game that favours them because of a funding deal valve and ATI did.. wouldnt the top of the range Geforce work just as well, without hardly any difference and also run other next gen games, like D3, and Far Cry.. whats with the hype, as far as im concerned all ive heard of is tests revealed that its better at handling shaders by a small amount, and from other proffessional comparisons on the cards. the Geforce 9950 i thinks, and the ATI radeon 9800 XT, ive heard words like. the difference is negleigable, and you'll hardly beable to tell any difference watsoever. so why spend all that dosh on the ATI at trade price when I can get a Geforce card that smacks a punch just as good, for 60 pound less.( I have researched trade prices, it helps when your dads a CompTech ). but people favour the ATI, for what... and extra 10 15 frames per second.

 

[Prince of China]

Edit=NVM :angry:

 

[dawdler]

Does the AntiAliasing simply blend the pixels on the edge of the objects to make them appear smoother..., if so , no wonder it takes up so much extra proccessing power, all that blending,,

PS: are these top of the range ATI cards worth the hype there surrounded in, just to specificly play 1 game that favours them because of a funding deal valve and ATI did.. wouldnt the top of the range Geforce work just as well, without hardly any difference and also run other next gen games, like D3, and Far Cry.. whats with the hype, as far as im concerned all ive heard of is tests revealed that its better at handling shaders by a small amount, and from other proffessional comparisons on the cards. the Geforce 9950 i thinks, and the ATI radeon 9800 XT, ive heard words like. the difference is negleigable, and you'll hardly beable to tell any difference watsoever. so why spend all that dosh on the ATI at trade price when I can get a Geforce card that smacks a punch just as good, for 60 pound less.( I have researched trade prices, it helps when your dads a CompTech ). but people favour the ATI, for what... and extra 10 15 frames per second.

Although this isnt anti aliasing, its a major part in what the test see as "hardly any difference". That's right, they ALWAYS compare equal settings in *numbers*. Yet ATI ALWAYS does it at higher quality (at faster speed I might add). Thus, the cards appear fairly equal, comparing X to X. When you go into nitpicking settings to achieve the same image quality, its a whole other matter.

 

[Blad3]

I can agree that AA is *really* neccesary (although after I bought a 9700 Pro I tend to get nauscious without it, the screen is constantly jaggy and rough, and its shimmering ALOT), but AF *IS* a neccesity. Higher resolution doesnt help this.

Ok, thank you for the input, I don't use either because of an incredibly low-end gfx (gf4 440 better known as a gf2 64mb) but I'll be getting a new setup soon, so I'll see then. It's good to know they make a noticeable difference and great visiual improvements are seen in games with AA and AF

 

[Prince of China]

ARRR!
AA:
You will see stuff like this!:
____________________________________________________________

 

[dawdler]

Lines with a whole in them? :upstare:

 

[Brian Damage]

No, I think he was trying to say we would see lines with a hole in them.

As to why, I have no idea.

 

[qckbeam]

you know, I have never seen a performance hit with AF, even on it's highest setting, AA on the other hand, well that's a different story.

 

[Arno]

Are you sure about the AA modes sampling just the edges? From what I read, the Parhelia's unique approach (and 16x sampling) where the big plusses. They said that the Parhelia was the only card to AA only edges and leave textures alone.

There's a huge article about multisampling here. It covers all topics: from supersampling, to Parhelia's approach, to rotated grid techniques. It also explains why textures aren't affected by multisampling. It's a very technical article. To be honest, I had some difficulty grasping all the concepts. But if you want to have more info on the subject, it's in there.

 

[commando]

thanks alot for telling me!

Yea yea i know i am a Prowler and i should know...But i didn't lol. because i put it on and i didn't really notice a difference in Far Cry..

But Now loads are saying Far Cry isn't good with ATI cards (((THEY GOT TO FIX THIS FOR THE MAIN GAME!!))

thanks alot everyone Great help!

This forum is getting back to alot of posts aday again! YAY.

 

[qckbeam]

But Now loads are saying Far Cry isn't good with ATI cards (((THEY GOT TO FIX THIS FOR THE MAIN GAME!!))

ATi cards work well with facry, just some small technical difficulties with control panel AA and AF. Nothing that can't be fixed