Temporal aa blurring ,why?

temporal aa blurring ,why? help me

I’m gonna assume its just normal behaviour. The basic idea of AA comes close to how you do blur as well. But only at places where tthere is aliasing. So it could all feel a bit blurry if there is a lot of aliasing because of how your objects is shaded or how dense the poly’s are.

Here is a nice overview for how the temporal AA works: