[magicalhippo]

Very interesting, thanks for sharing.

I get that a perfectly divergence-free field might not be what the artist is after, but if you go the projection route where you "subtract out the divergence" so to speak, I was thinking you could just do a scaled subtraction to not take all of it out. Alternatively perhaps it could be artistically interesting to do a non-linear scaling.

Anyway, seems like a fun rabbit hole.