Doom3 why AA makes little difference?

[thekey]

I gamed Doom3 at 1280x1024 I saw little differenec with aa on or off. Why is this in contrast to say.. Most Wanted or Black & White 2?

 

[AlNom]

There'll be less noticeable aliasing when the edges of polygons are in darkness most of the time.

 

[see colon]

plus, aliasing is most noticable when there is a big contrast in colors. most things in doom3 are greyish (or redish in hell).

 

[cloudscapes]

I havent played D3 in like a year, but I seem to recall a lot of aliasing/shimmering on the per-pixel effects, with and without AA. this isn't a bug, but a limitation of current per-pixel bump effects. supersampling does exist, but is costly.

plus as see colon mentioned, there isn't a huge range of colors or contrasts a lot of the time

 

[SirPauly]

It was the specular artifacting that bothered me some-what in a title like Doom3.

 

[Ghost of D3D]

most things in doom3 are greyish (or redish in hell).

I thought Doom3 was mostly black

Seriously though, it's hard to provide any reasonable or relevant opinion/explanation for this thread starter's question without knowing what his priority order is like when it comes to alleviating aliasing (IOW, AA); is it the LOD/shimmering textures, the edges, the, um, "pointy heads" (yes, I read that some think that the lower-than-expected polygons of characters is actually "aliasing"! Funny but I read it!), etc.

In any case, going back to my first sentence : Doom3 has been described by John Carmack to me as "not exactly brightly lit", a scenario that should "accentuate" (for lack of a better word!) aliasing. Maybe this actually answers the thread-starter's question...

 

[Ghost of D3D]

In any case, going back to my first sentence : Doom3 has been described by John Carmack to me as "not exactly brightly lit", a scenario that should "accentuate" (for lack of a better word!) aliasing.

I meant to say "should not "accentuate"".

PS. Does this forum allow editing?

 

[Fodder]

Yes, but only once you've progressed to (I think) the 'Member' rank.

 

[Blazkowicz]

Aliasing is very visible in doom 3 for me, I run it in 800x600 2x AA / 2x AF on my geforce 4 and it looks better than 1024 with nothing.

 

[nintenho]

I meant to say "should not "accentuate"".

PS. Does this forum allow editing?

Your going to have to wait a week or so. I think I had a hundred posts when I could do it. Why they don't let you edit, I have no idea.

 

[soylent]

Aliasing is very visible in doom 3 for me, I run it in 800x600 2x AA / 2x AF on my geforce 4 and it looks better than 1024 with nothing.

Is specular effects on? That is as far as I can tell where a lot of the aliasing comes from and MSAA will simply do nothing to diminish it.

 

[Blazkowicz]

everything is on, there's banding and chess-board pattern which I blame on the low shader precision (related to specular I think, I didn't try the game without the specular lighting).
It's the classic polygon edge aliasing that I really notice, I run every game with 2x MSAA now.