Let's see whether that's true with other games.
Radeon X1900
GeForce 7
Serious Sam II is literally filled with transparent textures, so it's perfect for evaluating adaptive and transparency antialiasing. You'll no doubt notice that there's no 'thickening' here on the GeForce 7. First of, the multisampling shots. You'll quickly notice that ATI's implementation is once again superior to NVIDIA - we notice less aliasing (on the vines) on the X1900 screenshots than we do with the GeForce 7's screenshot. As for the supersampling screenshot, it's hard to see the differences. If we were only to rely on these static screenshots, we have to say that ATI's adaptive antialiasing is as effective as NVIDIA's transparency antialiasing. But it's truly not. In motion, we notice some aliasing still present on the Radeon X1900, where the GeForce 7 has none or very little. NVIDIA's transparency antialiasing is more effective than ATI's adaptive antialiasing when supersampling.
Need more proof? Well, so far, we've only seen screenshots with 4x antialiasing. Below are some screenshots from both cards with 2x adaptive and transparency antialiasing. With less samples, we can see more aliasing so it will be easier to spot the differences. Plus, we can also see which one offer the best 2x antialiasing for transparent textures. Supersampling only, of course.
Radeon X1900
GeForce 7
With the thickening present, it's still hard to decide which one is the less aliased image. You'll have to look real close to see the differences. But in the end, NVIDIA's transparency antialiasing prove superior to ATI's adaptive antialiasing.Let's see the Serious Sam II screenshots. With no thickening issues, it should be easier to judge which one is more effective at antialiasing transparent textures.
Radeon X1900
GeForce 7
With less samples, it's easier to spot the differences between the two. The trick is to differentiate between polygon edges and transparent textures. Look at the leaves on faraway trees, you'll definitely see more aliasing on he Radeon X1900 than on the GeForce 7. An easier spot will be on the right: look at the leaves on the tree on the right. Once you know what to look for, you can see the same thing on the vines of tree in front of Sam.
So, unlike 'standard' antialiasing, NVIDIA has the upper hand in quality with transparency antialiasing. Because of this, we can't really do an apples to apples comparison here. Keep this in mind when you're looking at the benchmark results.
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