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Doom 3 shader mod for ++ performance

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my results...

laptop NV28M @ 225/470, 61.45, 840x525 MQ:
with hack 28.8fps
without hack 28.8fps

can't do much about that. :p

desktop 6800GT @ 400/1100, 61.77, application controlled AF (with hack/without hack):
1600x1200UQ 53.5fps/63.0fps hack is much slower
1600x1200HQ 55.6fps/65.6fps hack is much slower
1024x768HQ 82.0fps/84.6fps hack is slower
800x600MQ 86.1fps/85.0fps hack is faster
640x480LQ 86.7fps/85.0fps hack is faster

The hack is slightly faster in 800x600 and 640x480, but is slower in 1024x768 and 1600x1200 for me. I verified it twice by switching between the 2 versions and I got the same results both times. Very strange because it's a pretty significant hit (~10fps). <shrugs> I'll just have to live with 63fps 1600x1200UQ. ;)
 
Well I'm a little less annoyed today...so let me explain...

wizzackr said:
empty - please give arguments for what you say. other than that i find this to be your first sad post, sorry.

Basically man if he had posted this as a trick that could potentially boost performance with a disclaimer that he wasn't sure about any impact it might have on visual quality I wouldn't have cared...but he posted it saying that you're gonna get a 40% performance boost and that he personally has solved all of ATi's Doom 3 performance issues...and the results simply don't back that up...

If he was just some random guy, again I wouldn't care, but he works for ATi...so despite the disclaimer in his sig his actions still reflect on them...if this hack boosts your performance even a little bit I say use it...I only take issue with the way it was presented...
 
9800pro @ 460/370 / 1gb ram / a64 3000+ @ 2.4ghz

With doom3 at 1152x864 Highquality noaa/af i was getting like 35fps in demo1, with the hack im getting 38 at no loss to quality at all that i can see.

http://www.forum-3dcenter.org/vbulletin/showpost.php?p=2110574&postcount=26
this tweak did absolutely nothing for me except drop my fps

im unsure of what exactly is causing the artifacts as people with the same cards/drivers as me get them, while i do not

whats wierd is people posting that they have like 9800pros and went from 42fps to 55fps with this tweak, why dont i see that :(
 
^eMpTy^ is right. Humus was being very iresponsible here. He should edit his first post and say that he is working on tweaking Doom 3's performance on ATi cards through the tweaking of shaders and that he will post updates as he finds them. He should also have a disclaimer about the IQ being effected by the tweaks.
 
Draconis said:
no I saw some peoples screenshots on b3d.
Yeah, that's what i thought it was. I saw the same bad specular highlights, mostly around the edges of the floor tiles in the timedemo. I thought maybe the "artifacts" were something else.

I wonder why the texture lookup that was replaced is slow on ATI cards. :confused:

^eMpTy^: it's no big deal. The speedup is only a couple of % when it works. It's ugly anyways although there are further tweaks (lowering the range from 16 to 8) and changing the shader operation to POW makes it look better. You can do other tweaks to parameters to make it faster than that. Timedemo scores are only increased a little. Individual screens can show a large increase if it's full of highlights. Only 2 people in the thread (both with 1 post each :rolleyes: ) claim to have got 10-15 fps from the tweak in a timedemo. Everyone else is reporting little to no improvement.
 
I really don't get all this ATI runs Doom3 terribly nonsense. My system is a year old (3GHz Northwood) but with an X800 XT-PE in it and I played D3 from beginning to end on a 23" widescreen LCD at 1920x1200 with High quality settings and never once did the game ever slow down to the point where I noticed it.

The only game that still manages to bring my system down to its knees is Dark Age of Camelot. In very large sieges with lots of trebuchets going off and 100+ people all over the castle and my framerate sits around 10fps.
 
^eMpTy^ said:
Basically man if he had posted this as a trick that could potentially boost performance with a disclaimer that he wasn't sure about any impact it might have on visual quality I wouldn't have cared...but he posted it saying that you're gonna get a 40% performance boost and that he personally has solved all of ATi's Doom 3 performance issues...and the results simply don't back that up...I only take issue with the way it was presented...

ok, i get it - and it is a valid point i have to admit... he overreacted on his find i reckon...
 
With that hack, the image quality has decrease that's why u gain fps.

http://www.crawspace.com/ss/d3/error1humus.jpg

http://www.crawspace.com/ss/d3/error1normal.jpg

compare these two screenshots.

With the hack the image looks more blurry.

While with orginal no hack one image look sharper.

Try look left side parts then swtich betweeen two screenshots u will know that with hack the image is blur.

Conclusion: LOwer image quiality but higher fps.
Not worth trying this hack actually. Dun want to lose image Quality
 
KakimotoR said:
compare these two screenshots.

Those shots show that whiting thing I was talking about, I set my value from 16 to 4 now, not sure if I'll benefit from and FPS increases, but the IQ seems to be less of an issue now - however saying that, I've noticed no increase in FPS so this hack probably isn't worth applying.

Edit: What's with that guys FPS? He's standing still (I'd imagine) while taking those screenshots and he's not exactly in a intense firefight, you'd think his framerate would almost match his refreshrate.
 
Sorry for those ppl getting high fps, but this hack actually reduce ur image quality afterall

I dun find this tweak useful at all. I dun want to throw away image quality to gain performance.
 
^eMpTy^ said:
Well I'm a little less annoyed today...so let me explain...



Basically man if he had posted this as a trick that could potentially boost performance with a disclaimer that he wasn't sure about any impact it might have on visual quality I wouldn't have cared...but he posted it saying that you're gonna get a 40% performance boost and that he personally has solved all of ATi's Doom 3 performance issues...and the results simply don't back that up...

If he was just some random guy, again I wouldn't care, but he works for ATi...so despite the disclaimer in his sig his actions still reflect on them...if this hack boosts your performance even a little bit I say use it...I only take issue with the way it was presented...

Since you don't own a ati card, you can stay away from this thread. This only benefits ati cards. I find Humus to be a very smart guy. He writes these on his own time and shares it with the gaming community.

NO ONE is forcing anyone to use these codes. Some people are actually benefiting from this and thats good enough.
 
trungracingdev said:
Since you don't own a ati card, you can stay away from this thread. This only benefits ati cards. I find Humus to be a very smart guy. He writes these on his own time and shares it with the gaming community.

NO ONE is forcing anyone to use these codes. Some people are actually benefiting from this and thats good enough.

u r wrong. This has nothing to do with wat brand card u own. This I said this again, this reduces ur Image Quality and u get fps performance boost. BTW the 40% performance boost is a "BS" depends how much u mod it, the more image quality u going to ruin. But boost ur performance. as for wat u said for ATi card only I would say since ATi card work slow on DOOM3 that's one of the way for ATi cards to gain performance. NVIDIA ppl dun need to use this hack to reduce Image Quality to gain fps.

This is the Truth
 
generally speaking increasing cache levels on certian engines specially noticiable on quake engine cause system stability issues. I don't really know since I haven't tested this out on the D3 engine.
 
KakimotoR said:
u r wrong. This has nothing to do with wat brand card u own. This I said this again, this reduces ur Image Quality and u get fps performance boost. BTW the 40% performance boost is a "BS" depends how much u mod it, the more image quality u going to ruin. But boost ur performance. as for wat u said for ATi card only I would say since ATi card work slow on DOOM3 that's one of the way for ATi cards to gain performance. NVIDIA ppl dun need to use this hack to reduce Image Quality to gain fps.

This is the Truth

Not to flame, but seriously.. are you retarded?
 
KakimotoR said:
u r wrong. This has nothing to do with wat brand card u own. This I said this again, this reduces ur Image Quality and u get fps performance boost. BTW the 40% performance boost is a "BS" depends how much u mod it, the more image quality u going to ruin. But boost ur performance. as for wat u said for ATi card only I would say since ATi card work slow on DOOM3 that's one of the way for ATi cards to gain performance. NVIDIA ppl dun need to use this hack to reduce Image Quality to gain fps.

This is the Truth

Did you even read humus's post? He says it benefits ati cards only. Taking a quick look at your sig, its obvious that you own an nvidia card. Do others and yourself a favor and stay out of this thread. It doesn't concern you.
 
fallguy said:
Kinda like PS3.0 and FC, eh?

No, this is nothing like SM3.0 in far cry. SM3.0 dun ruin ur image quality but improve both IQ and fps in Far Cry. Crystek is going to release SM3.0 textures soon for FarCry.
 
trungracingdev said:
Did you even read humus's post? He says it benefits ati cards only. Taking a quick look at your sig, its obvious that you own an nvidia card. Do others and yourself a favor and stay out of this thread. It doesn't concern you.

For u, please read my post again.
And please make urself a favour , dun come here again.

BTW Humus didn't say "benefit" for ATi "ONLY <- "
I have read his thread in Beyond 3D too and those screenshots were posted by ppl who got ATi cards. Image Quality lose is the truth and stop defending.
 
KakimotoR said:
No, this is nothing like SM3.0 in far cry. SM3.0 dun ruin ur image quality but improve both IQ and fps in Far Cry. Crystek is going to release SM3.0 textures soon for FarCry.

Im talking about "getting excited for a 3fps increase" being similar. If you're talking about those two screen shots, they look the same to me.

Take no offense to this, but with your AOL typing, it is hard to take anything you say seriously.

"dun" "ur" ... etc. Again, please dont take offense.
 
KakimotoR said:
No, this is nothing like SM3.0 in far cry. SM3.0 dun ruin ur image quality but improve both IQ and fps in Far Cry. Crystek is going to release SM3.0 textures soon for FarCry.


From the forum thread..I only saw SOME people getting artifacts not all. Where you do you get this info from?
 
Jesus, the Nvidia lovers are out in full force in this thread. :rolleyes:

It must be great having nothing better to do.
 
ThisMonsterLives said:
It must be great having nothing better to do.

OFT:
Already beat D3. It was great not having to wait for beta drivers/hacks. :p

ON: Sorry guys, I've just never liked that guy. However I do have a question. This hack...does it increase OGL performance in any other games? Can it be applied to other games. Or is it a D3 only thing? And if it is why are people getting so worked up about it? Instead of praising ATI you could be busting their balls and demanding better OGL performance. I dunno, but if I payed $500 for a vid card then turned around and saw a $300 vid card matching it in ANY game I'd be understandabley miffed.
 
# perform a dependent table read for the specular falloff

He is taking the specular channel calculations out.

That will improve performance and drop iq! You will be using one less texture per pass.

Actually not taking it out just modifing the way the engine handles it.
 
The Batman said:
OFT:
Already beat D3. It was great not having to wait for beta drivers/hacks. :p

Yeah I have tons of trouble running the game. I have to take the res all the way down to 1600x1200.
 
Original Poster DaveBauMann

Utilisings normalisation via math will decrease your your texture fill-rate, which should increase the performance under AF situations (expectially if texture sampling and math instructions are interleaved effectively by the hardware).
 
The Batman said:
OFT:
Already beat D3. It was great not having to wait for beta drivers/hacks. :p

ON: Sorry guys, I've just never liked that guy. However I do have a question. This hack...does it increase OGL performance in any other games? Can it be applied to other games. Or is it a D3 only thing? And if it is why are people getting so worked up about it? Instead of praising ATI you could be busting their balls and demanding better OGL performance. I dunno, but if I payed $500 for a vid card then turned around and saw a $300 vid card matching it in ANY game I'd be understandabley miffed.


Well this is a specific hack for the D3 engine. There has to be a reason for Carmack to put it in this way, and thats because the specular calculations give an extra bonus for normal mapping. Although they aren't needed it helps image quality a bit.
 
ThisMonsterLives said:
Yeah I have tons of trouble running the game. I have to take the res all the way down to 1600x1200.

4xAA is yummy. Disabling Tri opts is even yummier. Getting better performance and IQ [opts disabled] out of a card that cost me $100 less = yummiest.
 
KakimotoR said:
For u, please read my post again.
And please make urself a favour , dun come here again.

BTW Humus didn't say "benefit" for ATi "ONLY <- "
I have read his thread in Beyond 3D too and those screenshots were posted by ppl who got ATi cards. Image Quality lose is the truth and stop defending.

some people can't get it through their thick heads....
 
The Batman said:
And if it is why are people getting so worked up about it? Instead of praising ATI you could be busting their balls and demanding better OGL performance. I dunno, but if I payed $500 for a vid card then turned around and saw a $300 vid card matching it in ANY game I'd be understandabley miffed.

This guys got the right idea. This hack, which I've personally experienced degrade IQ is no excuse for terrible OpenGL performance. ATI aren't spending enough resources researching and developing OpenGL performancing - how do I know? Just look how well the D3D performance is and how it's developed. We shouldn't be getting all happy over this little 3fps increase, which does degrade IQ - the obmission of these few lines of code from the retail Doom 3 aren't the problem which causes our Doom 3 suffering. It's ATIs sucky OpenGL. I don't know whether it's how they've made the cards or whether it's a driver problem, but if we're going to keep giving ATI our money we should at least have decent OpenGL support. I'm sure JC did everything he could to optimize this game, after all, the more who can play it - the bigger the profits. In the end of the day, the only ones who'll fix our problems is ATI, we just have to make them do so.
 
The Batman said:
4xAA is yummy. Disabling Tri opts is even yummier. Getting better performance and IQ [opts disabled] out of a card that cost me $100 less = yummiest.

That's nice. Had a GT been available when I got my X800 2 months ago I would have considered one. That's one of the benefits of not playing favorites, having choices.
 
gordon151 said:
Uh, no it's not noted anywhere that you are required to change the cache size settings and no one with an nVidia card has reported any change in their fps as of yet.

there were two different hacks, I was thinking about another.
 
KakimotoR said:
Original Poster DaveBauMann

Utilisings normalisation via math will decrease your your texture fill-rate, which should increase the performance under AF situations (expectially if texture sampling and math instructions are interleaved effectively by the hardware).


umm....what he said
 
g3no said:
umm....what he said


pretty much what he is saying is its more optimal when af is on due to the calculations being done before hand.
 
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