Anti-Alising Takes the pixels in the game and blurs the edges of them so that the Hard spikey edges would not be visable

there are two was a 3d card can generate anti-aliased images here are the pros and cons of both

one was is to render each individual polygon from back to front veiw so it can blend appropriately with whats behond it

sadly if you render out of order it can have unusual effects on the game

the second way is to render the whole scene at a higher resolution that what is to be needed then scale down the frame this soud blend away all of the sharp jagged edges

this can get good results but it takes up too much space and some graphics cards cannot handle the frame because of the added pixels