Understanding Anti-Aliasing

[Scoobes]

Kynes said:

Scoobes said:
Sooo... anyone know why FXAA causes texture blurring?

Because it's a blur filter. A clever implementation of a blur filter, but it does not calculate more geometry/color samples, as other AA methods do. The good thing about FXAA and other shader AA methods is that they have a very low performance hit, and they also help with specular/shader aliasing, but they fail miserably with subpixel geometry and you can have texture blurring. There is an evolution of FXAA called SMAA that provides better image quality: http://www.iryoku.com/smaa/

Thanks for the info. SMAA has more of a performance penalty though doesn't it?