Too sharp and detailed normal map

[kirill_7256]

Atomic/default Normal node makes  great normal maps,  sharp and per pixel precise for  closeups  but  produces  a bit of shimmering effect  when light to surface angle is sharp .      Sobel math node dosn't but  it makes super blurry results for something like asphalt grains  or anything with tiny  details  creating  visually  3 times bigger asphalt grains  than atomic Normal node for example.  

Does anyone know a proper solution for this :  special normal map blur , filter   or what math it should be to adress this issew ?  Something not as blurry as Sobel for  smal  2-3 pixels details?    Our  engine cant use TAA.

I tried to mix default and sobel node 60/40   but result  looks even  worse?    

[Luca Giarrizzo]

Hello,

Do you have control over the mipmaps for the normal map in your engine? You may adjust the filtering applied to mipmaps, or even create your own mips. That would provide control over how the map looks from a distance.