HDR + AA on Nvidia

H

Hyperblau

Limp Gawd
Joined
Sep 10, 2005
Messages
217
So if ati managed to do it, does anyone think we might see HDR + AA on nvidia cards anytime soon.
 
no I'm pretty sure this is a hardware limitation, maybe in the next gen chips from nV
 
Well it's possible through the developer, Valve has implemented a form of High Dynamic Range in the Source Engine that allows for Anti Aliasing, but using Nvidia's "preferred" way (not sure how to phrase it..) no, AA isn't possible then. It was a limitation I think they should of rectified in the 7800 line but they must of had other priorities.
 
Yiffy said:
Well it's possible through the developer, Valve has implemented a form of High Dynamic Range in the Source Engine that allows for Anti Aliasing, but using Nvidia's "preferred" way (not sure how to phrase it..) no, AA isn't possible then. It was a limitation I think they should of rectified in the 7800 line but they must of had other priorities.
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Don't think it could have been rectified since the g70 is based on the nv40, there has to be quite a bit of modification to the general structure of the chip to add this feature, the ALU's will need to calculate FP 16 and these calculations will need to be sent directally to a buffer for AA to be applied, at the moment the ALU's can do the calculations but can't do the second part.
 
kinda sounds like nvidia could have spent some time to get aa working with hdr and delay the release
but instead they released it ahead of time to gain market share

or Ati probably took so long to get the r520 out with a 90nm gpu that they needed to add features like this to look better then the 7 series
 
razor1 said:
Don't think it could have been rectified since the g70 is based on the nv40, there has to be quite a bit of modification to the general structure of the chip to add this feature, the ALU's will need to calculate FP 16 and these calculations will need to be sent directally to a buffer for AA to be applied, at the moment the ALU's can do the calculations but can't do the second part.
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Ah, I must of made a trivality out of a more rooted problem then.

Well I figured since NV brought new stuff like Gamma Corrected AA + TRAA to the table with the 7800, why not another new feature? Guess I forget just how complex this stuff is sometimes.
 
mrgimble said:
Its sad because HDR without AA is useless for most people.
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If you name me a video card that can run a true HDR game at 1280x1024 and 4xaa and 8xaf, I'll give you a cookie. Sadly this is a cool feature, but the R520 would not be able to make it playable.
 
^
HDR was not very playable on 6800s but no one cared. Plus we have not seen any bench marks of games with HDR and AA on like with Far Cry and Half Life so lets wait.
I think 1280x1024 with 4-2xAA or 8-16AF may be possible.
 
HDR and aa looks amaizing, i was able to enable both in splinter cell: chaos theory, looks very very very nice. I got about 10fps though, with HDR on and no AA about 50.
 
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