ATi Radeon 4000 Series Anti-Aliasing Investigation
Image Quality (MSAA/CFAA)
For the image quality comparison, I have chosen an outside scene from the original Far Cry. Since AA’s main benefit comes during movement, these images have been zoomed in order to better show differences. I would suggest loading the images into separate br/owser tabs and quickly switching between them. Also ensure br/owser image scaling is disabled.
0xAA
2xAA
4xAA
8xAA
12xAA
24xAA
2xAA provides a small improvement over 0xAA in areas 1 and 4, but not much with 2 and 3, probably because the sampling angle is similar to those surfaces’ angles.
4xAA provides a small improvement over 2xAA with surface 3, but large improvements with the other three surfaces.
8xAA provides slight improvements over 4xAA along all four edges.
12xAA is better than 8xAA on surface 1 and 4, but it’s slightly worse with the other two surfaces.
24xAA is the best overall. It’s even better than 12xAA on surface 1 and 4, while being just as good as 8xAA on the other two surfaces.
Notice how the lonely tree in the top-left is not getting any AA no matter what mode is being used? I’m going to check that tree in more detail in the next section.
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