Sign in to follow this  
Christopher Low

Anisotropic filtering

Recommended Posts

Ok, I've just installed my new GeForce 3 Ti 200 graphics card. I have set anti-aliasing to 4xS using Riva Tuner, and forced anisotropic filtering to level 8. The problem here is that I don't believe that the anisotropic filtering is working. I took the screenshot below for a different reason, but you can clearly see that the textures look too blurred in the near distance, and I was expecting this to have been sorted out.Can anyone help me here ? The anti aliasing seems to have reduced the texture shimmering even further than my old GeForce 2 GTS with 2xFSAA, but I really want to sharpen up those distant textures.Also, what other aspects of Riva Tuner should I be looking at ? There is something called LOD bias adjustment, but I don't know if I should change this or not. I am aware that LOD is short for LEVEL OF DETAIL.Best Wishes,Chris Low,ENGLAND.

Share this post


Link to post
Share on other sites
Help AVSIM continue to serve you!
Please donate today!

Chris,I don't use Geforce card but I do have LOD controls and they DO make a big difference in what you see.. they can also impact FPS with more detail.Just record where it is set as default and experiment with it a bit. Save some time and just go to both extremes and you will get the idea real quick.Staggerwing

Share this post


Link to post
Share on other sites

Staggerwing,I tried setting the LOD bias adjustment to the opposite extremes..........and I failed to see ANY difference whatsoever ! In fact, nothing seems to make a difference. Is there anything that I'm missing here ?Chris Low,ENGLAND.

Share this post


Link to post
Share on other sites

Hi, Chris. In Windows Display options, if you go to Advanced settings, in your new driver tab, go to Direct3D; you should have Mipmap Detail Level, set it to Best Image Quality. On my setup, before I did that, I tried all settings in NVmax (like RivaTuner) and still the quality in FU3 was bad. Then, only by chance, when I put the above option, it made a huge difference in FU3 and FS2002.See if it works for you.

Share this post


Link to post
Share on other sites

Naji,It's already set at Best Image Quality !When I'm flying, the close textures change from blurred to clear like they do with BILINEAR filtering. This isn't what should be expected with anisotropic filtering. The textures are supposed to be sharp to a considerable distance. Am I right ?Chris Low,ENGLAND.

Share this post


Link to post
Share on other sites

Naji,Another point to consider here is that my framerates haven't changed AT ALL ! This surely can't be right with anisotropic filtering forced to level 8 ?This just convinces me that it isn't working, and that really p***** me off.Chris Low,ENGLAND.

Share this post


Link to post
Share on other sites

Having experimented wil all anti aliasing settings, it would seem that 4xS is the only half decent setting for GeForce cards. This form of anti aliasing is apparently advertised for GeForce 4 cards, but is an undocumented feature of GeForce 3 cards (I can only access it through RivaTuner). Is this true ?Chris Low,ENGLAND.PS. If someone can solve my problem with anisotropic filtering, then I would be VERY grateful. No, no..........not THAT grateful :-lol

Share this post


Link to post
Share on other sites

Chris,First I gotta tell you that this pic has far better clarity than any pic I have seen you post before. Looks great! Your lack of detail in the distance may be a factor of your FU3 settings?? I may have to look in to a GeForce 3 or 4 on the basis of this pic... how about a few more to help me judge? (please) How do your panels look?When I went from the V3 to my current V5 my fps soon went way down... but that was a result of my cranking all the FU3 detail to max... couldn't resist with the AA and all!I repeat... I think your pic looks really good! :)

Share this post


Link to post
Share on other sites

>Ok, I've just installed my new GeForce 3 Ti 200 graphics >card. I have set anti-aliasing to 4xS using Riva Tuner, and >forced anisotropic filtering to level 8. The problem here is >that I don't believe that the anisotropic filtering is >working. I took the screenshot below for a different reason, >but you can clearly see that the textures look too blurred >in the near distance, and I was expecting this to have been >sorted out. >>Can anyone help me here ? The anti aliasing seems to have >reduced the texture shimmering even further than my old >GeForce 2 GTS with 2xFSAA, but I really want to sharpen up >those distant textures. >>Also, what other aspects of Riva Tuner should I be looking >at ? There is something called LOD bias adjustment, but I >don't know if I should change this or not. I am aware that >LOD is short for LEVEL OF DETAIL. >>Best Wishes, >>Chris Low, >ENGLAND.Hi Chris,Since you have just recently installed your GF3 I can only assume that you are using drivers newer than 23.10's if that is the case you cannot access Lod bias adjustment any finer than LOD 0 which is what "best image quality" driver settings will give you. To enable finer negative LOD values you will have to run the LOD bias script patch that is available in RVtuner under the power user tab you will see an icon of a folder with a gear on it, open it and go to patch scripts/Nvidia and then pick according to your OS, read the instructions, you will need to place the xxxxx.dll in a temp directory, run the patch and then copy the patched xxxxx.dll into the system directory while in safe mode. You then will be able to use negative LOD vales. :)As for GF3 settings the best settings I can recommend are a LOD of -0.3 at 32tap(level4) Aniso with Quincunx AA but be warned the more you ask of the card the slower she gets! :)Take Care,

Share this post


Link to post
Share on other sites

Paul,Does this mean that changing the current values of anisotropic filtering and LOD bias adjustment directly in RivaTuner are currently not doing anything ? I assume that this must be the case, because neither the framerate nor image quality changes at all. Only the 4xS anti aliasing seems to reduce texture shimmering.Best Wishes, and respond soon !Chris Low,ENGLAND.

Share this post


Link to post
Share on other sites

Paul,The instructions for the LODbiasfix patch script aren't very clear. Can you describe EXACTLY what I have to do to run it ?Best Wishes,Chris Low,ENGLAND.

Share this post


Link to post
Share on other sites

>Paul, >>The instructions for the LODbiasfix patch script aren't very >clear. Can you describe EXACTLY what I have to do to run it >? >>Best Wishes, >>Chris Low, >ENGLAND. Sorry to get back to you so late Chris. Here is what to do:First go into your winows/system folder and search for the nvdd32.dll file and then copy it to a temptorary folder, now run the "LODbiasfix" script from RVtuner (pick out the script according to what OS you have, you'll see once your there..) and when it ask you where the "drivers" are just point it to the temp folder that you saved the dll in, now run the script, and then boot into safe mode and copy the updated "fixed" nvdd32.dll from the temp folder into your system folder and reboot to normal mode. Your negastive LOD values will now work.As far as aniso goes that is already fully adjustable....as I type this it is finally dawning on me....err is FU a D3D, OGL or glide game? Doh!!!???

Share this post


Link to post
Share on other sites

Paul,If the anisotropic filtering is fully adjustable, why isn't it working ?Chris Low,ENGLAND.

Share this post


Link to post
Share on other sites

Paul,The procedure isn't working properly. It is telling me that the patch hasn't been executed properly. What's wrong ?Chris Low,ENGLAND.

Share this post


Link to post
Share on other sites

>Paul, >>The procedure isn't working properly. It is telling me that >the patch hasn't been executed properly. What's wrong ? >>Chris Low, >ENGLAND. It should work just fine, make sure you activate the version for your OS, and you did put the nv32dd.dll in a seperate directory first?As far as Aniso goes it should all function just fine and with your GF3 all levels from 2(trilevel to 8(64tap) should be available, you are adjusting the Direct3D settings right?

Share this post


Link to post
Share on other sites

Paul,I used the Win9x version, since I have Windows ME.I put the nv32dd.dll file in a temporary directory.I have been adjusting the Direct3D settings for anisotropic filtering.Thanks for the advice. As far as the LODbiasfix patch script is concerned, it probably doesn't matter that this doesn't work. However, I don't see any reason why anisotropic filtering shouldn't work. When I am flying, the textures become sharp virtually instantly when I move into range, which is something that looks remarkably like bog standard bilinear filtering to me. Surely the textures in the distance should look sharper and less blurred when using anisotropic filtering forced to level 8 ?Best Wishes,Chris Low,ENGLAND.

Share this post


Link to post
Share on other sites

Chris,>>I used the Win9x version, since I have Windows ME. >I put the nv32dd.dll file in a temporary directory. >I have been adjusting the Direct3D settings for anisotropic >filtering. Go back and check your temp directory, you may have recieved the error becuse of the newer driver not being recognized by RVtuner however it may/should have gone ahead and patched it, check and see if it now has a new date and that there is an *.dll.old copy now there, if so rebot into safe mode and copy the updated file over to your system and you will be all set. :)>Thanks for the advice. As far as the LODbiasfix patch script >is concerned, it probably doesn't matter that this doesn't >work. However, I don't see any reason why anisotropic >filtering shouldn't work. When I am flying, the textures >become sharp virtually instantly when I move into range, >which is something that looks remarkably like bog standard >bilinear filtering to me. Surely the textures in the >distance should look sharper and less blurred when using >anisotropic filtering forced to level 8 ? Right, it should be working, one thing you can do is make sure you have set the display at "best image quality" in your normal GF3 driver D3D menu, that will at least insure that your running at a LOD of >0:)Later,>Best Wishes, >>Chris Low, >ENGLAND.

Share this post


Link to post
Share on other sites

Paul,I have already done everything that you have suggested above. Anisotropic filtering isn't working with FU3, and it's as simple as that. One point that I can make here is that it IS working with Jedi Knight 2. I noticed that the floor textures are now sharp and clear into the distance, and the framerates are super smooth.If anyone is using anisotropic filtering with FU3..........how have you done it ?Chris Low,ENGLAND.

Share this post


Link to post
Share on other sites

Is anyone using anisotropic filtering with FU3 ? If so, are you SURE that it is working ? A brief discussion of exactly how the textures have been improved would be wonderful.Chris Low,ENGLAND.

Share this post


Link to post
Share on other sites

I have aniso working on my GF3 Ti500.I do not use the 4XS mode, because it's a Supersampling FSAA mode, which also affects the textures. It causes banding of the sky in FU3, and the textures look a bit fuzzy. The advantage is that the smoothing of edges is superior to the other modes. I use the normal 4x mode instead. I prefer the smoother sky color over slightly nicer edges, but it's a matter of personal opinion.It is true that the 4XS mode is an undocumented feature of GF3 cards, and actually a feature of the GF4 series. It's ugly marketing tactic by Nvidia, I guess.Now to the Aniso.There are three differences that I have found when using Aniso:1. Texture flickering/moving textures is gone2. Sharper textures3. Lower FPS1.The biggest difference after setting Aniso to the highest setting in RivaTuner is that the textures will not "flicker" or move at all when flying. If you look for it, you may notice one or two pixels flickering here and there, but the difference should be like night and day compared to running it with no Aniso. I'm sure you know what I mean with the moving textures, because that has been a big problem for me since the day I installed FU2 even. But not anymore :)2.The textures also appear slightly sharper, but in FU3 in, the difference is very small. FU3 may look good, but it based on FU2, which is fairly old technology. Even with anisotropic, there is still some blurring because of limitations in the FU3 graphics engine. In FS2002, Anisotropic makes a much bigger difference to the sharpness of the textures. The LOD setting does not seem to have an effect in FU3 for me, but it works in other games. However, if you adjust the LOD setting to far to the negative side, you will get back the moving textures again. Therefore, I recommend you keep it at no less than -0.5 for any game.3. There WILL be a drop in the framerate. Over complex areas like downtown Seattle, the CPU does the most work, not the graphics card, so in those areas, the FPS drop will only be a few FPS. However, over simple areas, with little 3d objects and only flat ground, the drop will be bigger. In some areas, the FPS counter is at a constant 50 FPS on my computer. Turning on Aniso brings it down to about 20-25 FPS! Over Seattle, the drop is much smaller, maybe from 20-22 FPS with no Aniso, down to 16-18 FPS with full.

Share this post


Link to post
Share on other sites

Jimmi,How on Earth do you get such high framerates ? I am getting 14-17 fps on average at 3000 feet altitude, with everything set at MAXIMUM detail, 4xS anti-aliasing (which hasn't reduced framerates at all from 2x using my old GeForce 2 GTS), and a resolution of 1024*768. This is using a 1.2Ghz Athlon Thunderbird, 512Mb PC-133 SDRAM, and a 64Mb GeForce 3 Ti 200 graphics card !This issue of framerates still annoys me, because I believe that I should be getting better from my PC. Let's face it, it isn't exactly a museum piece ! I don't know if having all three haze methods set to SPECULAR reduces framerates or not. Maybe someone else does ?Chris Low,ENGLAND.PS. Does everyone that uses my San Francisco STAR scenery get a 10 second freeze on take off or landing from Crissy Army Airfield with the Belvedere Island, Angel Island and Golden Gate Park packages installed ?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this