Which new drivers have 3dc support?

Discussion in 'Videocards - NVIDIA GeForce Drivers Section' started by satrab, Sep 1, 2005.

  1. satrab

    satrab Master Guru

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    I wanted to test something, but I would need to have some drivers that support 3dc. Anybody knows which (especially newer) drivers have 3dc support?

    Thx if you can help.
     
  2. fivefeet8

    fivefeet8 Ancient Guru

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    All of the newer drivers should have 3dc support.
     
  3. satrab

    satrab Master Guru

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    Hmm maybe they do.. so here is a second question, does the 6600GT also support it, or only the 6800 series?
     
  4. Mr.DJ

    Mr.DJ Member

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    Only the 7800 series supports 3Dc!
     

  5. fivefeet8

    fivefeet8 Ancient Guru

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    Any video card can support 3dc through software. The 6800 cards support it through drivers. You can test this out with Humus's 3dc demo here:

    http://www.humus.ca/index.php?page=3D&ID=49

    Incidentally, DXT5 texture compression looks exactly the same as 3dc in that demo.
     
  6. satrab

    satrab Master Guru

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    Hmm that demo works stragne for me, in that room there isnt any light :(
    For example i have npw the 77.77 Drivers, but when i run "The Project" demo (Far Cry Engine) and want to enable 3dc it crashes...
     
  7. fivefeet8

    fivefeet8 Ancient Guru

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    The 3dc Humus demo has a problem with rendering shadows on Nvidia cards. Disable shadows and then flip 3dc on/off. It will work.

    The project was programmed to run 3dc in hardware. Which no Nvidia card can do. It would need to be programmed to run in software.
     
  8. satrab

    satrab Master Guru

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    Hmm , thx fivefeet8

    Yes, the 3dc Humus demo works after disableing the shadows.

    Thx
     
  9. Glidefan

    Glidefan Don Booze Staff Member

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    Isn't hardware 3dc a feature of ATi? :confused: or i'm missing something here?
     
  10. Mr.DJ

    Mr.DJ Member

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    Yes, 3Dc is a "normal map" compression alg. that ATI invented and implemented as a hardware feature in their latest generation of graphics cards. ATI made 3Dc free to use for anybody and back when I read about it, I understand Nvidia introduced the Normal compression feature only to their latest 7800 cards.

    You may be able to run the feature in software, but then one of the features strong selling points would seem to go out the window.

    The 3Dc feature's main goal was to provide up to 4 times more normal map data, with no performance hit.
    Running the feature as a software emulation, would suggest more CPU load and thus the "no performance hit" goes out the window...

    Links: http://www.theinquirer.net/?article=22734

    http://www.nvidia.com/page/specs_gf7800.html (intellisample 4 section)
     

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