What production method was used to create the whirlpool in The Odyssey's Scylla attack?

Jet skis riding in circles provided reference material for the whirlpool in The Odyssey’s Scylla attack.

The production later replaced that reference with digital visual effects. This method gave the visual-effects team realistic information about water movement, spray, turbulence, and circular motion before creating the finished whirlpool.

The same sequence combined practical and digital techniques. A ratchet system lifted stunt performers into the air for Scylla’s attack, while the monster itself was predominantly digital. The approach allowed real performers and physical motion to interact with a creature that could not be fully built as a conventional on-set prop.

The whirlpool detail illustrates the film’s hybrid effects philosophy: practical reference and performer work supplied physical authenticity, while computer-generated imagery completed the impossible elements.