Nice, thank you for a very detailed instruction on particle-based method. I also saw Victor's presentation of flame animation with frame-by-frame drawing (around the 20 minute mark of https://www.youtube.com/watch?v=xRUyfhFu3s8), which was really neat in the end-result, but a little difficult for me...

Some of you may have seen this animation demo by user "onionskin"... He did some interesting, very artistically convincing, work here (watch till end): EFYpoHB0heY I am wondering if anyone knows what is going on with the limbs of the two character rigs shown -- How is he able to move them ...