u/Aila-Aila

https://reddit.com/link/1tauqoy/video/36p9anowvn0h1/player

Here is a little proof of concept of a video feedback in Pov-Ray. It is pretty simple, just mapping the previous render to a box object placed in the back of the screen. in the foreground i have mapped a video file(source video) onto a bunch of moving spheres, which are then merged together using the build in "blob"-function.