A bit of background: I created these (and recorded the process) as a entry to a graphics clan recruitment challenge. I used to go by the name "Krave". If you fancy checking out the video/speedart, you can find it as well as a few others on my Youtube channel @ /user/autumnmade
Thanks!
Virus style:https://gyazo.com/a031211b8aa30fd5461a9aaa32e15db1
Particle style:https://gyazo.com/d1a89dfbcf85cf283cd6298caae4f88b