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Thread: NVIDIA ForceWare 70 and 75 MIP Boundary Shimmering with GeForce 7800 GT and GTX

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    HEXUS webmaster Steve's Avatar
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    NVIDIA ForceWare 70 and 75 MIP Boundary Shimmering with GeForce 7800 GT and GTX

    Join me as I discuss how anisotropic texture filtering works, before moving on to investigating what's up in the current drivers, followed by a look at what NVIDIA has done in a very recent driver build to fix one of their user-selectable quality modes. Finally, I'll round things off with a chat about NVIDIA's filtering choices and what to expect in the future from the major IHVs.
    http://www.hexus.net/content/reviews...lld19JRD0xNTQ5
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    Nice article, it was technical but I just about followed it. I better get the new ForeceWare installed.
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    ATI Technologies exAndrzej's Avatar
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    Quote Originally Posted by Xenctuary
    ...just about followed it...
    Worrying really - considering the level of user reading HEXUS

    I had a chat with the HEXUS Hierarchy yesterday and suggested that Rys start off with pictures next time... literally !

    There is a video of HL2 which shows a 6800 running against a 7800 and the shimmering is perfect to see where the level of detail changes from one picture to the next

    The point at which is changes is the crucial thing here

    7800 has significantly more horsepower than the previous 6800 series...

    ...so why reduce the quality by deliberately moving the points where you opt for lower quality samples ?

    I can only see one advantage myself...
    .
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    Steve, I couldn't find where "MIP" was defined. What is it? I enjoyed the article.

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    HEXUS webmaster Steve's Avatar
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    Quote Originally Posted by Artic_Kid
    Steve, I couldn't find where "MIP" was defined. What is it? I enjoyed the article.
    This might help: http://en.wikipedia.org/wiki/Mipmap
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    Rys
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    Quote Originally Posted by Andrzej
    7800 has significantly more horsepower than the previous 6800 series...

    ...so why reduce the quality by deliberately moving the points where you opt for lower quality samples ?

    I can only see one advantage myself...
    Given that performance lost is next to nothing with the new driver...

    I'm happy enough with their explanation that it's a bug.
    MOLLY AND POPPY!

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    DR
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    We will have a glossary soon (well as soon as I have the guts to ask Iain to devlop it!)

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    ATI Technologies exAndrzej's Avatar
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    Quote Originally Posted by Rys
    ...explanation...
    Oh dear - silly me - there it is in the driver release notes...

    <cue Bill & Ted's Excellent Adventure style scene with a time travelling phone box and a reminder to one's self to go back and write the notes>
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    Banhammer in peace PeterB kalniel's Avatar
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    Very nice article. Especially:

    Quote Originally Posted by hexus
    Ah, but we preach to the choir! We were remiss in not investigating it sooner, especially since the issue's been around in some form or another since 2004. If we ask IHVs and driver teams to focus on image quality, we must do so ourselves. Rest assured we'll try to do so as much as we're able to.
    Some of us have been asking for just this. If reviewers review cards thoroughly and present the results in a clear and distinctive manner the end user will be empowered to demand greater IQ performance from gfx cards and make their purchases accordingly.

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