Assassins Creed DX10.1

Discussion in '3D Hardware, Software & Output Devices' started by Sound_Card, Apr 17, 2008.

  1. CarstenS

    Veteran Subscriber

    Joined:
    May 31, 2002
    Messages:
    4,915
    Likes Received:
    2,237
    Location:
    Germany
    What i fail to grasp in techreports story is the following:
    [my highlighting]

    What does he mean? Is there no visual difference right now, without the patch? That'd invalidate their problem, which causes post effects to render properly.

    Or do those effects not render properly in the current state of the game and there should be no visual difference when everything is working as it's supposed to be.

    Or is the regular DX10-path broken and fixing it would (somehow, through strange correlations between space, time and the universe as a whole) require to also remove DX10.1-support?
     
  2. pjbliverpool

    pjbliverpool B3D Scallywag
    Legend

    Joined:
    May 8, 2005
    Messages:
    7,722
    Likes Received:
    936
    Location:
    Guess...
    I took it to mean that one.

    The same post effects should be rendered in either DX10 or DX10.1, thus the image quality should be identical. The only difference would be performance since DX10.1 takes one pass to render the effects and DX10 takes 2 passes.

    Problem is, DX10.1 isn't rendering the effects properly so although its still faster, the'r is a visual difference that shouldn't be present in the DX10.1 implementation.

    Whether thats true or not is a different story. A comparison shot between R600 and RV670 in a scene were the supposed difference is apparent would be pretty definative.
     
  3. AlexV

    AlexV Heteroscedasticitate
    Moderator Veteran

    Joined:
    Mar 15, 2005
    Messages:
    2,528
    Likes Received:
    107
    Umm, it has already been done.Somewhat extensively. There is indeed something you'll be missing, in some scenes. One effect.
     
  4. pjbliverpool

    pjbliverpool B3D Scallywag
    Legend

    Joined:
    May 8, 2005
    Messages:
    7,722
    Likes Received:
    936
    Location:
    Guess...
    Which effect? I'm not talking about the superior AA of DX10.1, this should be an effect thats present in R600 and missing/incorrect in RV670.
     
  5. AlexV

    AlexV Heteroscedasticitate
    Moderator Veteran

    Joined:
    Mar 15, 2005
    Messages:
    2,528
    Likes Received:
    107
    Yeah, that kind of effect.
     
  6. pjbliverpool

    pjbliverpool B3D Scallywag
    Legend

    Joined:
    May 8, 2005
    Messages:
    7,722
    Likes Received:
    936
    Location:
    Guess...
    Do you have a link to the screenshots?
     
  7. AlexV

    AlexV Heteroscedasticitate
    Moderator Veteran

    Joined:
    Mar 15, 2005
    Messages:
    2,528
    Likes Received:
    107
  8. Jawed

    Legend

    Joined:
    Oct 2, 2004
    Messages:
    10,873
    Likes Received:
    767
    Location:
    London
  9. Silent_Buddha

    Legend

    Joined:
    Mar 13, 2007
    Messages:
    16,987
    Likes Received:
    6,236
    It's hard not to buy into the conspiracy theory that UBIsoft will hold back a DX10.1 patch until Nvidia can get a DX10.1 class product on the market (if they ever do).

    I'm sure ATI is more than willing to help them with any efforts with regards to "fixing" the DX10.1 path, especially considering it makes them much more competitive with the Nvidia offerings.

    An interesting developement of this whole broohaha. That article at TGDaily (I think that's the one) mentions several developers praising DX10.1 codepaths in their upcoming games and commitment to shipping with DX10.1.

    EDIT - had to go find it. http://www.tgdaily.com/content/view/37326/98/

    Now if only we knew who that developer was. :)

    Regards,
    SB
     
    #109 Silent_Buddha, May 11, 2008
    Last edited by a moderator: May 11, 2008
  10. Demirug

    Veteran

    Joined:
    Dec 8, 2002
    Messages:
    1,326
    Likes Received:
    69
    It wasn’t me.

    The statement isn’t the full truth either. You can eliminate this second pass with D3D10 (even with D3D9), too. But as you need to use an additional render target for this job this would require additional work on your shader code. The Direct3D 10.1 solution for this problem is much easier to implement as you just make a copy of the depth buffer at the right point.

    Depending on your overdraw factor it could be a good Idea to keep this additional pass (but with MSAA active) to fill the depth buffer for Early-Z when it comes to the expensive shader rendering.
     
  11. silent_guy

    Veteran Subscriber

    Joined:
    Mar 7, 2006
    Messages:
    3,754
    Likes Received:
    1,380
    Conspiracy theories are definitely more fun, but why is it so hard to believe that both companies are telling the truth?

    Here's a different theory: AC has been completed. The majority of the players who will buy the game have already done so. The A-team at Ubisoft has moved on to newer projects. The B-team stays behind to fix up urgent bugs and keeps the game in maintenance mode. (This is a common mode of operation in a lot of companies, BTW. It's a great way to let junior programmers/engineers gain experience before graduating to the A-team.) All additional funds spent won't result in meaningful additional sales and are basically a net loss, so effort is being kept to the bare minimum and rather than spending time fixing bugs in two render paths, they just limit themselves to the one that works for both brands.

    Definitely more boring and straightforward than the conspiracy angle, which is exactly why it's way more likely...

    It's one thing to risk your reputation for the gold standard of GPU benchmarks, it's a whole other thing to do so for AC (solid, but not exactly a blockbuster) after it has already been released, especially if the competition is still not blowing away your equivalent cards despite the 20% performance increase.
     
  12. cho

    cho
    Regular

    Joined:
    Feb 9, 2002
    Messages:
    416
    Likes Received:
    2
  13. Arnold Beckenbauer

    Veteran

    Joined:
    Oct 11, 2006
    Messages:
    1,430
    Likes Received:
    362
    Location:
    Germany
    http://www.fudzilla.com/index.php?option=com_content&task=view&id=7355&Itemid=1
     
  14. AlexV

    AlexV Heteroscedasticitate
    Moderator Veteran

    Joined:
    Mar 15, 2005
    Messages:
    2,528
    Likes Received:
    107
  15. Arnold Beckenbauer

    Veteran

    Joined:
    Oct 11, 2006
    Messages:
    1,430
    Likes Received:
    362
    Location:
    Germany
    #115 Arnold Beckenbauer, May 15, 2008
    Last edited by a moderator: May 15, 2008
  16. AlexV

    AlexV Heteroscedasticitate
    Moderator Veteran

    Joined:
    Mar 15, 2005
    Messages:
    2,528
    Likes Received:
    107
    They're not fixed as they were never broken through the DX10 path to begin with. It's like saying:dude, I just chopped off your arm because you had a nasty tatoo. But the tatoo is gone.

    They also didn't fix the AA quality in DX10, which is inferior to both 10.1 and DX9. And there are reports on UBis boards that the same bugs from before the patch are there, so they didn't seem to fix/improve much if anything with this particular update, they just removed 10.1 for whatever reason they chose to.
     
  17. Wesker

    Newcomer

    Joined:
    May 3, 2008
    Messages:
    103
    Likes Received:
    0
    Location:
    Australia
  18. nicolasb

    Regular

    Joined:
    Oct 21, 2006
    Messages:
    421
    Likes Received:
    4
    Link: http://www.pcgameshardware.de/aid,6...t_3D_101_support_for_Assassins_Creed_planned/

     
  19. Mariner

    Veteran

    Joined:
    Feb 6, 2002
    Messages:
    1,721
    Likes Received:
    390
    Anandtech are the latest to have a swipe at Ubisoft for removing DX10.1 support.
     
  20. jb

    jb
    Veteran

    Joined:
    Feb 6, 2002
    Messages:
    1,636
    Likes Received:
    7
    No plans to re-implment? How freaking lame and sad of Ubi :(
     
Loading...

Share This Page

  • About Us

    Beyond3D has been around for over a decade and prides itself on being the best place on the web for in-depth, technically-driven discussion and analysis of 3D graphics hardware. If you love pixels and transistors, you've come to the right place!

    Beyond3D is proudly published by GPU Tools Ltd.
Loading...