Interesting FAA article

[103er-Fan]

16xFAA article (german)

This article shows screenshot of some FSAA testprogramm, the conclusion is that the FAA has great quality, but there are specific things which didn't get anti-aliased many times though the edges are clearly noticable. That place is the middle of the triangle to be more specific:
Parhelia 16xFAA:


GF4 Ti4600 4xFSAA:


These pictures are the best example, I am wondering how many times that happen in actual games and why the FAA doesn't anti-aliase these edges, though you can really see them.

[APEXNETHOR]

Yes this is interesting since I too have noticed the jaggies present in a comparison pic of an entrance in the UT2003 demo that was shown on the Anandtech.com review of the Parhelia card HERE. The demo clearly illustrates the parhelia's 16xFAA mode enabled and it seems do most of the scene perfectly with an exception to the canopy in the scene for some reason? I wonder if this is the way FAA is going to be or if Matrox will be in the works of making a fix in their driver support for this in the near future?

[TdB]

seems like the edge detection algorithm in 16xfaa doesn´t detects intersections.

[piaxVirus]

Hmm...that really sound like what is actually happening here. I originally thought it was a detection threshold, that needed to be adjusted. Now, if it is intersections that are causing the missed edges. I hope Parhelia's 16xFAA can be fixed to detect intersections. In other screenshots, I have seen missed edges that were not caused by an intersection. So this explanation could still be wrong.

[DC]

could this be solved if adaptive tessellation is used? Then you have an edge in middle of those triangles. Or am I missing something?

Dc

[Drizzt]

Why the hell edges of the polys should be detected?
They are already defined into the scene geometry!!!