How to blend hair alpha smoothly?

Hello, everyone. I’ve searched for this for a while and am coming back to it again, still without an answer. When you use an opacity mask, how do you make it look nice and smooth instead of jagged? I used to think it was my textures and I was doing it wrong, but testing this in modelling software tells me otherwise. I could use this for many models, but at the moment I really need it for hair. I’ve tried the temporal AA dithering with some blur offset, as suggested on-line, but it produces a dotted texture that still looks rather poor. I’ve seen other people use this technique without such a dotty result and am not sure of the difference. Here’s my material and the result on the model:

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Thanks a million.