AA + HDR

man_from_uncle · 22 Mar 2006 at 21:25

I am just about to embark on an Elder Scrolls: Oblivion based adventure and I am hearing rumours that disturb me. Apparently AA and HDR will not work at the same time. Worse still is the apparent fact that the two will work simultaniously with an X1900 card (worse for me because I have a 7800gt).

Does anyone know anything that might shed light on whether or not this might be true?

Thanks

man_from_uncle · 22 Mar 2006 at 21:46

Sigh.......25 hits and no comment.

No one knows do they?

Naffa · 22 Mar 2006 at 21:53

well.. seeing as no'one else will post i will. i had a 7800GTX 256MB and had 8xAA on with full HDR on CS:Source on Nuke and Militia.. if you need proof i can take some screenshots

bungler · 22 Mar 2006 at 22:29

Afraid you can only use AA and HDR on the Xbox 360 version. Not even ATI cards will do both on the pc. It's due to the way they implemented it.

chovi · 22 Mar 2006 at 22:49

i`d take hdr over aa i think, less of of a fps hit aswell........of course if youre running at 1600x1200 then its a no brainer !!

BrynS · 22 Mar 2006 at 23:24

bungler said:
Afraid you can only use AA and HDR on the Xbox 360 version. Not even ATI cards will do both on the pc. It's due to the way they implemented it.

Yeah, hopefully more details will emerge in the coming weeks regarding Oblivion's Xbox 360 and PC HDR implementations as sites integrate Oblivion into their testing suites. It appears as though Oblivion uses an HDR format that currently only supports MSAA on the Xbox 360 (ATI Xenos GPU).

Cheers,

BrynS

Phil99 · 22 Mar 2006 at 23:33

naffa said:
well.. seeing as no'one else will post i will. i had a 7800GTX 256MB and had 8xAA on with full HDR on CS:Source on Nuke and Militia.. if you need proof i can take some screenshots

That means absolutely nothing due to the different ways HDR can be implemented.

fullfat · 23 Mar 2006 at 00:46

well as far as i knew the 7800 series couldnt do it.
only the x1800 series could and possibly the 7900 cards too??

im happy to be corrected though

ajgoodfellow · 23 Mar 2006 at 01:01

I always thought that too - that the 7800 series couldn't do HDR & AA for most SM3 implementations but the X1800 can

The HDR implementation in Lost Coast is different to most as it doesn't use SM3 - for example, X800 cards can do HDR in Lost Coast but not for most other games

oweneades · 23 Mar 2006 at 07:48

fullfat said:
well as far as i knew the 7800 series couldnt do it.
only the x1800 series could and possibly the 7900 cards too??

im happy to be corrected though

Wouldn't the 7900 series be limited in the same way the 7800series were (due to virtually identical architecture)

ajgoodfellow · 23 Mar 2006 at 11:29

I'd imagine so but I haven't heard either way

n3x · 23 Mar 2006 at 11:56

Well according to this thread http://forums.overclockers.co.uk/showthread.php?t=17541999 HDR + AA doesnt work on oblivion at all regardless of gfx card.

There is however another option called "Bloom" which apparently looks almost identical to HDR but allows AA at the same time.

Hopefully my copy is waiting at home so i can test this out for myself

Jack Bauer · 23 Mar 2006 at 12:25

As far as im aware its to do with the two differnet ways in which HDR can be implimented in to a game. One of thse uses the same pipelines as AA and therefore both cant be used at the same time. Halflife 2 engine does HDR so that you can use both but oblivion does it the other way as its delveloped for the xbox as well ( this has seperate hardware for rendering AA and HDR ) so the PC cant run AA and HDR on oblivion and never will as the developers can be bothered to recode the game with a patch as it will take to long. Not the most technical of posts but I think the general idea is correct.

LabR@t · 23 Mar 2006 at 12:50

use AA + bloom I cant tell the difference to bloom over HDR in this title tbh

Energize · 23 Mar 2006 at 16:11

I agree bloom+aa if your running at less than 1600x1200 anyway.

fullfat · 23 Mar 2006 at 16:15

oweneades said:
Wouldn't the 7900 series be limited in the same way the 7800series were (due to virtually identical architecture)

i have no idea tbh, i was just talking out loud to get hings going really. ive read difernt views onit, some saying you can run them both on the nvidia hardware others saying that you cant. but it does make sense if its being done diferently from game to game for example

Naffa · 23 Mar 2006 at 17:52

Phil99 said:
That means absolutely nothing due to the different ways HDR can be implemented.

fair enough. il go with you on this because i think your sig is so good..

aardvark · 23 Mar 2006 at 19:46

yep - its not possible to have both HDR and AA in oblivion on the PC full stop.

Alexrose1uk · 23 Mar 2006 at 19:48

Shame about that.
In general ati's latest cards can do it though, dependant on game engine, nvidia's latest cant do it full stop.
Source has a code around so both can be done, but unless you're high end ATi, in general its one or the other.