smaa s2x vs msaa?

[Denis Stoikovski]

What is the difference which one is more demanding?

 

[TStahler]

More recently as of the HD 6000 series, ATI has introduced Morphological Anti-Aliasing (MLAA) which uses post-processing to apply a form of full-scene anti-aliasing to any game, with performance similar to edge-detect CFAA but with better results. Nvidia has also introduced Fast Approximate Anti-aliasing (FXAA), which is similar to MLAA. In both cases, the main drawback is that they can introduce some blurring to the scene. A recent form of MLAA that does not have blurring, but performs quite well is known as Subpixel Morphological Anti-Aliasing, or SMAA.

SMAA S2x is SMAA 1x + MSAA 2x
SMAA 1x : improved MLAA, better quality, faster speed, slightly slower than FXAA

MSAA is basic, isn't specially optimised or anything, but it gets the job done.

Basically MSAA will provide better results, but is far more performance sapping than SMAA alone. But SMAA S2x is basically SMAA combined with MSAA x2. So that would be more performance sapping than SMAA alone.