So I've been messing with some particles. I'm not too good at it, and these ones are pretty bad, but most of them have fun collisions and things, so if you want to mess with those, go ahead. I hope you enjoy these!
one of these models comes from turbosquid, here's the link: https://www.turbosquid.com/3d-models/3d-kunai-model-1836489#
