what is Anialiasing?

what is this if i spelled it right (not sure) and how do you do this.

thanks for all replies

http://en.wikipedia.org/wiki/Antialiasing

has anyone tryed antiailiasing?

is it worth doing?

It's not really something you can "do" per se... instead a good graphics engine is designed to antialias graphics at a high rate of speed... that's part of the reason a good graphics card brings out clean, crisp textures and polygons... because antialiasing can hide that effect. It's a technique that's been around for a while now in video games... but you have to leave it all up to the computer.