A second full day of work on the Cat Covid video. The number of layers means that, even on this super-fast PC, it takes about 15 minutes to render the final film, from 5 full sets of 4230 frames, plus the video clips. It's complex, and certainly much easier to put together than many of my films made using AviSynth, but it's not hugely satisfying artistically.
Still, this draft, which has taken about two and half days, is just about good enough, and has pushed some limits hitherto unpushed, which is one key goal when doing anything creative.
I'll keep musing and working on it over the next few days.