This is an excellent book about the principles for drawing secondary dynamic effects, including fluid, fire, smoke, steam, explosion, magic, and solid props.
A hierarchical, coarse-to-fine process applies not only to static drawings but also dynamic animations in the form of coarse energy flows controlling fine visual details.
However, this is not a tutorial book, and one will need (a lot of) practice to really learn (I am currently following this).
The book touches upon digital assistance for manual animation, an exciting and important research direction that also fits my hobby.
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