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ATI busted? Again?

G

Genx87

Lifer
Looks like ATI may have got their hands caught in the cookie jar yet again. It looks like they "may" be doing bilinear filtering when they are supposed to do tri. When they force tri via the control panel performance drops about 20%.

Further fuel for the fire.

<a target=_blank class=ftalternatingbarlinklarge href="http://www.techreport.com/etc/2004q3/ati-doom3/index.x?pg=1
">http://www.techreport.com/etc/...oom3/index.x?pg=1
</a>


 
Yeah, saw the article this morning.

think ATI's defense is that its Brilinear filtering.



Gotta love the marketing terms.
 
So all of our tests and our counter-mojo line up to support ATI's explanation for the DOOM 3 image quality problems and performance anomalies we've seen. ATI does have a bug in its Catalyst 4.8 and 4.9 beta drivers currently available to the public, and that bug affects image quality in DOOM 3. However, ATI is not trading off image quality for performance; this is an honest-to-goodness software glitch, and nothing more.

The bug also seems to be squashed in later builds of the Catalyst 4.9 driver. I'd like to see ATI update its hotfix for DOOM 3 with a newer version of the 4.9 beta, so that Radeon owners can enjoy DOOM 3 without the image quality problems we've noted.
...
ATI will be moving in the direction of application detection and optimization in its future driver revisions?a big departure from the company's current policy. So, if in the future DOOM 3 is making a request for filtering on textures that ought not to be filtered, ATI's drivers might not turn on filtering for those textures. One of the goals of ATI's policy shift will be addressing just this sort of problem.
...
App detection won't be a part of the upcoming Catalyst 4.9 drivers slated for release in September, but it will be included in the following version, Catalyst 4.10.
Click to expand...
 
If you guys had actually read the article in its entirity, you would know that these image quality issues have nothing to do with "brilinear" or cheating of any sort. They are simply bugs in the game that they're working to fix.
 
lol, Genx87! try reading the article next time:

Conclusions
So all of our tests and our counter-mojo line up to support ATI's explanation for the DOOM 3 image quality problems and performance anomalies we've seen. ATI does have a bug in its Catalyst 4.8 and 4.9 beta drivers currently available to the public, and that bug affects image quality in DOOM 3. However, ATI is not trading off image quality for performance; this is an honest-to-goodness software glitch, and nothing more.
Click to expand...
 
Originally posted by: Rage187
Yeah, saw the article this morning.

think ATI's defense is that its Brilinear filtering.



Gotta love the marketing terms.
Click to expand...

that would be funny, considering ati doesn't even do Brilinear!

i think you were hallucinateing. 😉
 
It's called a bug Gen, did you just happen upon the article now and missed the other thread on the article?
 
Of course it is a bug.

nm it is a late day and I cant read lol.

I am interested in whether or not an older pre-doom3 release demonstrates similar problems visually and if not what the performance difference would be.

 
obviously, if the "older pre-doom3 release" uses the same specular lookup table and cube map textures which are excluded from using af; then, yes there would be similar problems visually on ati drivers which work on a global basis for af setting and the performance difference in forceing af on everything would be the same.
 
I am curious if the older drivers dont exhibit the problems and what the performance difference is.

This would make an interesting article if there are differences from older drivers. It is clear the driver is not doing what it supposed to do. The newer driver does and exhibits little visual issue to the nake eye.

 
First, the new 8.051 driver that alleviates the image quality problem in DOOM 3 doesn't seem to harm performance at the game's default settings, which is good news for ATI. Yes, the score does drop by one frame per second, probably because that magnification filter is doing its thing, but that's it. These results seem to jibe with what ATI was telling us.
Click to expand...

Sound like ATI was honest and has a fix.
 
You can't tell during gameplay, just like you couldn't tell Nvidia's brilinear during gameplay.

Useless fanboy penis-pumping. Lock plz.
 
Originally posted by: Genx87
Looks like ATI may have got their hands caught in the cookie jar yet again. It looks like they "may" be doing bilinear filtering when they are supposed to do tri. When they force tri via the control panel performance drops about 20%.

Further fuel for the fire.

<a target=_blank class=ftalternatingbarlinklarge href="http://ww.../...oom3/index.x?pg=1
">"><a target=_blank class=ftalternatingbarlinklarge href="http://www.techreport..../...oom3/index.x?pg=1
">"><b"><a target=_blank class=ftalternatingbarlinklarge href="http://www.techreport.com/etc/...oom3/index.x?pg=1
<b"><.../...oom3/index.x?pg=1
</a>
</a>
</a>
]http://www.techreport.com/etc/2004q3/ati-doom3/index.x?pg=1
<b[/L]
Click to expand...

No, it looks like a troll shoveling more sh*t into the fire to me. Read the article the next time :roll:
 
it WAS a bug, and hey, if you read ALL of the Article, NVIDIA even called them up and said it was a bug, and defended ATI's stance...how's that for being nice? 😀
 
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