Gabbyjay Wrote:AFAIK AMD drivers support SGSSAA too.
4xSGSSAA, for example, essentially is RGSSAA, as you end up with a rotated grid for optimal EER. It's only scaled a bit, so you wont get vast subpixel-free areas between to neighbouring pixels. A rotated grid is a form of sparse grid in this case.
You can also see this on nVidia cards, when you have a look at the sample mask patterns for MSAA/SGSSAA:
http://pics.computerbase.de/1/5/8/8/6/41.png
That image is referring to a 7900 GTX. Different GPUs use different sample patterns at the hardware level for the same AA method at the driver level. As far as I know SG wasn't implemented yet on the geforce 7 series.
If AMD does support SGSSAA they still have a completely different implementation of it that's not going to look the same.
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-Ron Swanson
"I shall be a good politician, even if it kills me. Or if it kills anyone else for that matter. "
-Mark Antony