Kitsune is great!

I've been a VideoFX tester, and have made a couple of five minute shorts. You end up having to generate a lot of shots that you throw away. This is a lot easier to bear if you are tester without really strict monthly limits, or having to pay to get past them.

Also, there are all sorts of things you have to juggle or sidestep related to character consistency and sound synchronization. They'll be also sorts of improvements there, but I suspect getting to 90 minutes isn't really a question of spending more time and generations. Right now I think a strong option for solo aspiring AI film makers is to work on a number of small projects, to master the art, and tackle longer projects when the tooling is better.