Nvidia 7950 GX2 gaming glitch?

[nib95]

I recently bought a 7950 GX2 and it's been great and all performance and OC wise.
But I'm seeing an un-usual glitch in some games.
It was most prevelant in COD2. But I see it now and again (though rarely) in HL2 Ep 1 aswell.

Basically, the glitch is, that certain objects change shape during gameplay.
But un-ordinarily.

Like, a soldiers clothes will look a certain way when I stand in one place, but if I move just a few feet forward, or less (forward on keyboard for just a second), suddenly the soldier and background geometry changes immediately.

Ayone know how I can irradicate this and why it's occuring?

I'm playing games on 'quality' setting Bios clamp 'on', but I've tried it with 'allow' aswell.
No difference. 16xAF and 4xAA. 1920 x 1200.

 

[LittleNemoNES]

Dude that's LOD. The Closer you are the more detailed things get. The further out the less detailed. It's used for better performance. Unfortunately, especially in COD2, its really noticeable. They have different models with varying levels of detail for the objects/people.

 

[nib95]

Originally posted by: gersson
Dude that's LOD. The Closer you are the more detailed things get. The further out the less detailed. It's used for better performance. Unfortunately, especially in COD2, its really noticeable. They have different models with varying levels of detail for the objects/people.

But I'm sure it's not supposed to be that obvious.
It never was on my old GPU's (2x 7900 GT or X1900 XTX).
It's just much more blatantly obvious in this one.

Any idea how to tone it down?

 

[BFG10K]

Try setting your driver settings to High Quality.

 

[Gstanfor]

So according to bfg10k, LOD is now an optimization controlled by switching from Q to HQ? :disgust:

OP, I think you should check the in-game settings as COD probably adjusted them upon detecting a change of graphics adapter.

 

[LittleNemoNES]

Here we go again...

 

[Nightmare225]

Change AF settings, also. Max them out, that card won't even cough.

 

[nib95]

Originally posted by: Nightmare225
Change AF settings, also. Max them out, that card won't even cough.

Is'nt 16xAF already maxed out?
The problem is not the aliasing or AF it's the glitch that has objects suddenly change shape in a split second.

 

[BFG10K]

So according to bfg10k, LOD is now an optimization controlled by switching from Q to HQ?

That depends if the problem's mip-map transitions or not.

 

[Gstanfor]

Oh, so mip map transitions determine mesh complexity (LOD) do they?

 

[TheRyuu]

It's LOD. Nothing you can do about it.

Also, try turning the Negative LOD Bias to Allow.
And with a program like RivaTuner, change the mipmap LOD Bias Adjustment to -0.1.

Those are just some tweaks that should give shaper textures. Shouldn't do anything to your LOD problem though.

 

[Capt Caveman]

Originally posted by: Gstanfor
Oh, so mip map transitions determine mesh complexity (LOD) do they?

How about offering some advice to the OP instead of being a TROLL?

 

[Gstanfor]

I already did. What have YOU contributed?

 

[nib95]

Ok guys, lets not argue

I appreciate everyones advice adn will be trying all the things mentioned.
I'll get back to you on whether or not they work.

 

[TheRyuu]

Originally posted by: nib95
Ok guys, lets not argue

I appreciate everyones advice adn will be trying all the things mentioned.
I'll get back to you on whether or not they work.

I doubt anything will help.
So it's a little LOD jump. Maby it can be smoother but you'll have to complain to Valve since thats the way they made the game.

 

[nib95]

Originally posted by: wizboy11

Originally posted by: nib95
Ok guys, lets not argue

I appreciate everyones advice adn will be trying all the things mentioned.
I'll get back to you on whether or not they work.

I doubt anything will help.
So it's a little LOD jump. Maby it can be smoother but you'll have to complain to Valve since thats the way they made the game.

It's not so bad in HL2.

But it's terribly blatant in COD2.

 

[TheRyuu]

Originally posted by: nib95

Originally posted by: wizboy11

Originally posted by: nib95
Ok guys, lets not argue

I appreciate everyones advice adn will be trying all the things mentioned.
I'll get back to you on whether or not they work.

I doubt anything will help.
So it's a little LOD jump. Maby it can be smoother but you'll have to complain to Valve since thats the way they made the game.

It's not so bad in HL2.

But it's terribly blatant in COD2.

Same here.

 

[BFG10K]

Oh, so mip map transitions determine mesh complexity (LOD) do they?

No but they have an impact on the visuals.

Or what, you think the LOD system uses the same sized textures regardless of distance? :roll:

 

[Dethfrumbelo]

Sometimes trees can be particularly bad in some games where branch positions change dramatically at different LOD stages.

If you want to place blame, put it on the developer in this case.

 

[josh6079]

I think you should check the in-game settings as COD probably adjusted them upon detecting a change of graphics adapter.

Why would the in game settings automatically change? If anything they would try to adjust from the automatic "High" setting to....the automatic "High" setting. His previous cards would have handled the highest in game settings (2x7900GT's/X1900XTX). Unless he's done an OS reformat and game reinstallation without setting them accordingly.

 

[Gstanfor]

I don't have COD2 myself, and haven't played past COD:UO (which I didn't finish - I don't particuarly like the COD series, especially when compared to the MOH:AA series).
The older COD series had a model detail slider (LOD system) in them - Text that COD aapears to lack - upon checking up I haven't even been able to find a console command to control model LOD, though there has to be away of doing so somehow since the game itself does it.

I'd suggest you look at this page - http://www.tweakguides.com/COD2_6.html, having your texture/normal/specular map resolutions set high should help reduce the visible iimpact of the LOD changes (as far as non geometry changes are concerned). I'd apy special attention to the specular resolution - this is what causes the moire pattern effect in the grated floors in Doom3 and it's very difficult to get rid of completely. - Text - In fact I'd say about 95% of what people call "shimmering" is actually specular aliasing.

 

[BFG10K]

Why would the in game settings automatically change?

Many games do this.

If anything they would try to adjust from the automatic "High" setting to....the automatic "High" setting.

Not necessarily. Many games default to low settings if the GPU is newer than they can detect.

 

[josh6079]

Originally posted by: Gstanfor
I don't have COD2 myself, and haven't played past COD:UO (which I didn't finish - I don't particuarly like the COD series, especially when compared to the MOH:AA series).
The older COD series had a model detail slider (LOD system) in them - Text that COD aapears to lack - upon checking up I haven't even been able to find a console command to control model LOD, though there has to be away of doing so somehow since the game itself does it.

I'd suggest you look at this page - http://www.tweakguides.com/COD2_6.html, having your texture/normal/specular map resolutions set high should help reduce the visible iimpact of the LOD changes (as far as non geometry changes are concerned). I'd apy special attention to the specular resolution - this is what causes the moire pattern effect in the grated floors in Doom3 and it's very difficult to get rid of completely. - Text - In fact I'd say about 95% of what people call "shimmering" is actually specular aliasing.

Originally posted by: BFG10K

Why would the in game settings automatically change?

Many games do this.

If anything they would try to adjust from the automatic "High" setting to....the automatic "High" setting.

Not necessarily. Many games default to low settings if the GPU is newer than they can detect.

Ah, I see. You learn something new everyday.