(Material) How make all gray values 1?

(Material) Can I make any grayscale values above a threshold all equal 1?

Just used the If node, after testing it’s not what I’m looking for anyway. Trying to make a better options other than DitherTemporalAA. Don’t suppose anyone has an alternative?

Based on what you described, I think the If node may be the right way to go, it does exactly what you said, all values greater than .5 in this case =1.
Alternatively, you could simply increase all values by .5 (add node) and then clamp the output to 1 (clamp node), so there would be a smoother ramp up to 1.
All depends on what you are using it for.
I’m not really familiar with what Dither Temporal AA is about.