So how do you do that with a computer? What’s the program they are using?
I’m not sure they’re using software to make the disks. Those could be some sort of lens flare effect. The fuzzy-looking things that are floating by could be done by software; I could write code to insert them using my own computer. I’m sure there are numerous video editing and effects packages that can be used to do this as well.
If they had been using software to make the disks, I don’t think they would have let the purple one in the foreground slip in there.
Have you ever heard of the movie Avatar?
Does the expression Computer-Generated Image (CGI) ring a bell?
Regards,