ati and ut 2003 "cheat"

digitalwanderer said:
hjs said:
Relax, think about your heart ;)
(but kick his ass)
<sigh>

Hanners was already there anyway, I just yelled at an nVidiot I found over there a little. :rolleyes:

I'll go check in the morning @ Work.
(I PB'ed Hanners before posting this here ;) )
 
DaveBaumann said:
Xmas said:
b) still not fixed yet.

Which might suggest something in itself.
Since it's not a hardware limitation (LOD bias works just fine), that sounds like the difference is intentional.

edit: Seems like I was wrong.
 
Xmas said:
edit: Seems like I was wrong.
In case you were banking on what I said over at 3dc, I didn't test it with aniso ... duh! I must admit that was major stupidity.

Found out anything new yet?
 
zeckensack said:
Found out anything new yet?
Yes, a positive LOD bias in combination with AF does not work just fine on R3x0, neither in D3D nor OpenGL. Instead, it affects the minimum LOD.
 
DaveBaumann said:
Xmas said:
b) still not fixed yet.

Which might suggest something in itself.
Does it suggest ATi needs to get off its ass and fix this bug, or Epic needs to get real and work around a hardware "feature?"
 
If you delete DetailTexMipBias in the UT2003.ini then go and set a graphics preference the above command is re-added and then set to........

DetailTexMipBias=0.000000

Which is then the same setting in openGL, WinDrv.WindowsClient, and SDLDrv.SDLClient
 
Tagrineth said:
RussSchultz said:
I find it amazing that anybody can call .9% a cheat with a straight face. That's so far in the noise its not even funny.
Oh my, that's a .3fps change (from a 100fps baseline)! WHATEVER SHALL WE DO?! ATi gained .3fps! Wow, that's gonna change people's opinion of the benchmark results...
Can you show me how you calculated that? Just curious and it might be my 2 hours of sleep...
 
Nick said:
Tagrineth said:
RussSchultz said:
I find it amazing that anybody can call .9% a cheat with a straight face. That's so far in the noise its not even funny.
Oh my, that's a .3fps change (from a 100fps baseline)! WHATEVER SHALL WE DO?! ATi gained .3fps! Wow, that's gonna change people's opinion of the benchmark results...
Can you show me how you calculated that? Just curious and it might be my 2 hours of sleep...

I think the point is that the performance difference between setting High Performance Mipmap quality and High Quality is very small indeed, in 3DMark 2001 there's less than 100 points difference.
 
RussSchultz said:
I find it amazing that anybody can call .9% a cheat with a straight face. That's so far in the noise its not even funny.

Exactly. Statistically, it's irrelevant. I think web sites like to make mountains out of molehills like this hoping to gain a bit more than a .9% increase in site traffic...:)
 
WaltC said:
RussSchultz said:
I find it amazing that anybody can call .9% a cheat with a straight face. That's so far in the noise its not even funny.

Exactly. Statistically, it's irrelevant. I think web sites like to make mountains out of molehills like this hoping to gain a bit more than a .9% increase in site traffic...:)

Well, if you listen to Evan Lieb, sites like AT or THG never would do exclusives and get used by IHVs for marketing purposes just to get hits. They do this for the noble purpose of informing their readers.
 
olivier said:
saw this at hardware.fr

use your favorite translater

En fait, cela est lié à la gestion du LOD (Level Of Detail – Niveau de détail) des textures chez ATI et à l'utilisation de ce paramètre dans Unreal Tournament. En effet, afin d’améliorer les performances des cartes graphiques sous UT2003, Epic utilise dans Unreal Tournament un LOD positif pour ces textures détaillées. Il est de 0.8 par défaut (DetailTexMipBias dans UT2003.ini), ce qui signifie que les textures passent plus rapidement (à une distance plus proche) au niveau de détail inférieur (mipmap) que cela se fait normalement (LOD à 0).

Seul problème, à partir d’un LOD de 0.5, les cartes ATI n’affichent plus du tout le premier niveau de détail de textures, le plus précis, lorsqu’on utilise l’anisotropic filtering alors que chez NVIDIA c’est encore le cas du fait d’un algorithme de calcul du LOD différent. Du coup, d’un point de vue qualitatif NVIDIA offre un meilleur rendu sur les textures très proches du point de vue avec ce réglage à 0.8.

S’agit t’il d’un "cheat" ? Pour en avoir le cœur net c’est assez simple, il suffit de tester ce que sont les performances avec un LOD configuré à 0.4 dans UT2003, ce réglage donnant les mêmes résultats chez ATI et NVIDIA. Sur une Radeon 9800XT la baisse constatée est de ... 0.9%, et elle est de 2.3% sur un GeForce FX 5950. Passer carrément à un LOD 0 sur ATI ne baisse d'ailleurs pas plus les performances. Bref, si il s’agissait d’une optimisation de la part d’ATI, elle serait bien mauvaise. Reste une question ... qu’est ce qui a poussé Epic à monter au créneau à côté de NVIDIA alors qu’un simple paramètre dans la configuration de leur jeu permet de résoudre le problème ?

they said the "cheat" give ati a boost of 0.9% and we can resolve the "cheat" with a parameter in the config file of ut 2003.

Sorry, olivier, but your brief account of what was reported by hardware.fr is hardly an accurate depiction.

This is precisely what was stated in that last (and most relevant) paragraph:

Is it a “cheat� Settling the matter is rather simple and requires testing performances with LOD configured to 0.4 in UT2003, this setting yielding the same results for ATI and NVIDIA. On a Radeon 9800XT the measured performance drop is … 0.9%, and it is 2.3% on a GeForce FX 5950. Going down to LOD 0 on ATI does not cause any further performance drop. In short, if this were an optimization on the part of ATI, it would be a poor one. One question remains … what compelled Epic to lend credence to NVIDIA’s claims when a simple parameter in the configuration of their game can solve the problem?

It's rather obvious (unless the author claims otherwise) that the intent of such comments was to raise serious doubts as to whether ATI did indeed cheat, rather than to support such an interpretation.

P.S. Really hate to be a nag, Dave, but you use the word often enough that I just can't hold it in any longer. It's spelled response. ;)
 
kemo, as olivier stated a few posts later, he used quotes around "cheats" to indicate that he also wasn't convinced of nV's and Epic's claim that ATi was cheating. And his short summation was an almost exact overview of your full translation.

I also think the King's/Queen's/dog's English may allow for a 'c' in response. Think of the alternate spelling as a way of adding colour to our great, shared language. ;)
 
Ahhhh, but we're not dealing with the Queen's English here, this is Daves English that sometime bears little resemblance to any other English and is usually made up totally on the fly!
 
DaveBaumann said:
made up totally on the fly!
The writing must be small then. How do you get it to sit still long enough to read it?

On 2nd thoughts, if you can have "writing on the wall" and "fly on the wall" I guess some of it can rub off.

Note to self: Must drink less coffee.
 
DaveBaumann said:
Ahhhh, but we're not dealing with the Queen's English here, this is Daves English that sometime bears little resemblance to any other English and is usually made up totally on the fly!

Don't you mean "Dave's English"? ;)

I can't believe you compile your own language. :devilish:
 
actually wouldn't the possesive form be spelled "Daves' English"?

Edit: Never mind. My mistake. I just looked in my usage guide and that form is used for Plural Noun possesive. Your right. :oops:
 
:LOL: I didn't remember my Favorite caveat..."Caution Be Sure Brain is engaged before putting Mouth in Gear" It was late and I was being stupid....

It's sooo hard being "God Like" 24/7. Once in a while you slip up! 8)

:LOL:
 
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