I want to get similar effect(link) of my particles, but I just can’t get an idea of that ribbons. How to create that “random motion” of purple lines? I don’t wan’t to use splines, 'cause it’s cheaty.

first of all, anything in games is cheaty, as long as the end result looks good. If you think you can achieve that result with splines go for it. second, the author of those vfx is one of the better ones in the industry and most of us respect him beyond comprehension. There are multiple ways to m…