I had a bit of free time today and i had this idea for an “Arrow shot” effect.
I’m at work so i’ll post screenshots of the material and the mesh later. But basically i’m using a curved mesh and panning a clamped texture over it (thanks to this tutorial: VFX Basics - Mesh Soulercoasters, also thanks sifa). I spawn a bunch of those, with a random initial rotation on the Y axis. And this is what i got so far after 1 or 2 hours of tweaking around:
(This would be the buildup)
Also, i don’t know if it’s the gif or the website, but here the curves look kinda static 
EDIT:
Well, here is the panning material, and the curved mesh:
