Some of the forum members over at Beyond3D, might of found a new AA mode called Temporal AA! which can be enabled in the current ATi drivers! Here's what MuFu had to say .... HOLY CRAP, IT WORKS IN UT2004!

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Absolutely positive - went from 4xT to 2x and the difference is so obvious. Plus you can see the tiniest bit of shimmer sometimes on high contrast edges (e.g. lanterns in dm-rankin) but it's not noticeable when moving or on low contrast boundaries.

Beyond3D

Thanks to EliteBastards