I guess that you have already seen the great demo “Logon’s run – 3D meets the aging bits” by Overflow / Logon System, which was released on the Revision 2017 demoparty in Saarbrücken / Germany. Norecess worked together with Overflow and released a “Making of” on his site in which all the techniques, which were used in the demo, are explained and how they were evolved until they reached the final state. Be sure to read it, because it is a great way to understand how this great demo works and maybe you get an idea for your next production :-). You can find the article on Norecess homepage.