Very happy with how this turned out for how simple it is!
I'm planning to use this swipe effect for various melee attacks, at different sizes and with different fade patterns, e.g. a smaller pointed "stab" and a long forwards "lunge".
Though i am contemplating to myself whether the very small amount of clipping here is an issue that i need to solve...
Probably worth it if i can re-learn how to do proximity fading.