My R9700 experince and Aniso still "flawd"?

Discussion in 'Architecture and Products' started by jb, Sep 6, 2002.

  1. Althornin

    Althornin Senior Lurker
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    Nope.
    just bilinear while z-rotated, on the R8500. No aniso at 45, going to full at 90 and zero.
     
  2. bmg

    bmg
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    I've tried Humus's driver and high res textures now work ok. Detail textures don't, however.
     
  3. NV25

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    I'm very impressed with the 9700. Only one game has given me a problem - Medieval: Total War (it crashes while loading the campaign). I'm not sure what's causing that because I can play single battles fine.

    Anyway, I get 12259 points in 3dMark2001

    Nature score has risen from 36 fps on a GeForce3 to 98 fps on 9700! I'll settle for that :) However, I do get some nasty lows in car chase (high detail). During the robot firing scene the speed sometimes drops to 22 fps, whereas my GF3 went no lower than 29 fps. :(

    system:

    Athlon XP 2200+
    512mb DDR Ram
    Radeon 9700 PRO

    One game I had to test was Morrowind, and it's super-smooth @ 1024x768 with 6x AA and 16x aniso. No sign of aniso probs that I could see but I've yet to play around with the settings to any great extent. I'll check out AvP2 as this game did have some issues on my GF3.
     
  4. Randell

    Randell Senior Daddy
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    aah found it, Digit Life specifically tested the aniso, thats where those coloured number tunnels come from (RightMark 3D), here's a snippet;

    'Have you noticed the difference? :) And now look at the screenshots of the RADEON 9700 above to make sure that the problem of angles close to 45 degrees is solved.
    Now let's return to the difference in operation of this "Performance/Quality" function. We saw above that although the anisotropy quality grew and didn't depend on angles anymore, it is still unable to coexist with the trilinear filtering. Quality mode'

    Here's the whole review

    http://www.digit-life.com/articles2/radeon/r9700pro.html

    strange then jb you dont concur, someone needs to test the SS:SE level as you asked.
     
  5. Humus

    Humus Crazy coder
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    Fixed :)
     
  6. OpenGL guy

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    You'll see results similar to the Radeon 9700 on a GeForce 4 as well. This is a very CPU limited benchmark, particularly at the point you are referring to.
     
  7. vogel

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    This is a bug in UT's OpenGL renderer extension querying code which I fixed for UT2k3 a while back. I'll post a fixed dll for UT at some point.

    -- Daniel
     
  8. vogel

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    http://unreal.epicgames.com

    -- Daniel
     
  9. Typedef Enum

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    Hey Daniel,

    How's she lookin', as far as an OpenGL renderer for UT2003?

    Come on, tell the truth...does it kick the crap out of the D3D one? :)
     
  10. Reverend

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    Er, that's what I meant (i.e. even if aniso is applied, it doesn't work/reverts-to-bilin when z-rotated).
     
  11. OpenGL guy

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    The 8500 only fails to apply aniso at 45 degrees.
     
  12. KimB

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    And, of course, the more accurate description:

    The degree of anisotropy is decreased from the maximum value when the polys are hotizontal/vertical to the minimum value of no anisotropy halfway inbetween.

    i.e. there are problems at all angles that are not perfectly horizontal/vertical...just that the most pronounced is at 45 degree angles.
     
  13. Althornin

    Althornin Senior Lurker
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    yep.
    Rev, sorry, it sounded to me like you were saying it did bilin+aniso when rotated, but that shot just shows bilin - no aniso at 45 degrees... sorry if i misunderstood you.
     
  14. Mize

    Mize 3dfx Fan
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    This statement is incorrect. Trilinear and Quality aniso work fine together. Also, I ran pcchen's rotating road proggie and the improvement in aniso over the 8500 is dramatic. I can't see any reason to call it flawed by any stretch.

    (like this card BTW except that it doesn't get along with two DIMMs at 185 FSB on my mainboard for some reason. I have to downclock to 175 MHz or remove one stick :()

    Mize
     
  15. Randell

    Randell Senior Daddy
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    I think I may have missed out the reference to Performance mode :)
     
  16. Reverend

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    Two questions :

    1) Based on jb's post, is this repeated with the 9700?
    2) I must've missed it (since it must've probably been explained somewhere) - why is this the case with the 8500 (i.e. no aniso at 45 degrees) ?
     
  17. Mize

    Mize 3dfx Fan
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    Based on my tests with pcchen's rotating road proggie, the 8500 has four points about a 360 degree rotation where aniso is applied virutally NIL. The 9700 has eight locations where aniso is slightly less sharp in the distance; that is the mipmap boundary edges only slightly closer eight times throughout a 360 degree rotation.

    As for the claim about quality aniso and trilinear not working together this is false as I've tested it with Q3A (colormiplevel=1). The mipmap boundaries are pushed back as with bilinear+aniso, but very smoothly blended owing to the trilinear filtering.

    The 9700 is a huge IQ improvement over the 8500.

    Now if I could just get the 9700 to get along with two DIMMs at an FSB of 180+ MHz :(

    Mize
     
  18. jb

    jb
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    Mize,

    I guess looking at those screens shots again and after playing around with it more could it be that its apply aniso at the 45 degree angles just not as much?
     
  19. Mize

    Mize 3dfx Fan
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    There are minima in the level of aniso filtering starting at about 15 degrees and every 45 thereafter. It is nothing like the minima in anisotropic filtering seen on the 8500; in this case the first minima is at about 45 degrees and repeats every 90 degrees and is quite severe (vitually no filtering). Personally, I find 16x + trilinear on the 9700 to be about the best IQ I've seen and at an amazingly low hit.

    Mize
     
  20. OpenGL guy

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    As I once posted on Rage 3D: There is no time when the 9700 doesn't apply anisotropic filtering. Unless, of course, no aniso is needed.
     
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