SMAA & FXAA, change size of pixel detection ?

for example:

- need bigger pixel area detection: old games with low res --> very big pixels, SMAA doesn't even detect edges as they are so big, in the other hand FXAA does a little bit:

(FXAA x8)




- need smaller pixel area detection: newer games with MSAA (or other kind of AA) still have aliased edges because those edges are just smaller with MSAA, not smoothed like FXAA or SMAA does, so they are still there just with small size (e.g.: MSAAx2 would need half size edge detection).



would be doable such parameter to control size?




_·

tried to change SMAA_RT_METRICS, pixel size, but nothing... really nobody knows anything about it?