Why is FX 2xAA worse than before?

Discussion in 'Architecture and Products' started by Randell, Jan 27, 2003.

  1. Randell

    Randell Senior Daddy
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    ANybody here who has previewed the card? I understood that one good point of nVidia AA was that from the Gf3 on the 2xMSAA was RGMS. So whats happened with the FX - driver bugs? A performance optimised solution or just back to OGMS that has hit edge quality?
     
  2. KimB

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    I'd say it's most likely a screen capture issue, just like Quincunx and 4x9 are often hard to capture on a GeForce4. We need somebody to check if the screenshots match what is seen is game.
     
  3. Randell

    Randell Senior Daddy
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    well Brent is here and I'm sure he said it was very noticable whilst playing UT2003 - but it could be screen capture. Wouldnt that then indicate a filter was being applied ala quincunx rather than MSAA?
     
  4. Bambers

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    I've put a post about this in the other thread (hardocp review) Other modes are also displaying wrongly. Both 6xS and 8xS in the NFSHP2 screenshots are worse than they are on a gf4 using the registry tweak to force the new modes.
     
  5. demalion

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    I had a theory of custom downsampling ala 3dfx, but then I realized I have no idea how that related to the performance on the Voodoo cards, so I don't know how feasible that is. If it hits performance like regular 2x AA, what would be the benefit?
     
  6. KimB

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    It doesn't necessarily mean anything. It's not unfeasible for the downsampling to be done at scanout (though this would require a higher-resolution back buffer), as it is for Quincunx and 4x9 on the GeForce4.

    As a side note, this could actually explain very nicely the large performance hit at 1600x1200x32 w/ 4x FSAA (memory footprint too large for decent performance).
     
  7. Brent

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    i will check it again, but thats how it looked in the game itself, in ut2k3...
     
  8. tEd

    tEd Casual Member
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    will there be 6x and 8x AA modes which also work in opengl?

    anybody know?
     
  9. Bambers

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    I think nvidia said 8x was opengl and d3d in november.
     
  10. tEd

    tEd Casual Member
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    seems that it is not yet available.
     
  11. nggalai

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    What version of ut2003 were you using? Apparently, some version (have to check which one) didn't properly support 2xMSAA on GF4 either.

    As for getting a screen capture of 2xMSAA, I just wrote this in Uttar's thread:
    ta,
    -Sascha.rb
     
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