Well we're out of luck with Blitz3D. Personally I prefer having Antialias always on to 4x. Last time I played a game without AA modes is on my older Radeon 8500.
This one here could be nice to have: http://www.blitzbasic.com/Community/posts.php?topic=40848
This one here could be nice to have: http://www.blitzbasic.com/Community/posts.php?topic=40848