Stepped hair render

Hey there,

I´m currently working on a cinematic character and I´m having trouble rendering nice and smooth hair…
I´ve tried a bunch of settings, various Cvars and sampling options I found online, but none seemed to adress the issue I´m having, which is very stepped hair, which leads to noisy/“swimming” renders.

Here is a current WIP animation with the issue:


I also just noticed, that the hair quickly looks correct, when I tick “Use Hair Raytracing Geometry”, but then reverts to these jagged lines.

I also checked the meerkat demo and didn´t find any fancy render settings there, but it looked correct in the viewport there…