Notes

Setup and configuration

Premult Roto to isolate alpha.

Smart Vector

Modify Vector Detail and Strength as applicable.

Link Smart Vector to Vector Distort.

Vector Distort

Define Reference Frame to track in Vector Distort with Set to Current Frame.

Enable Frame Hold on defined Roto.

Source: https://www.youtube.com/watch?v=snPA3aKdBJs&ab_channel=Foundry%2Cimaginationengineered

Doc: https://learn.foundry.com/nuke/content/reference_guide/time_nodes/smartvector.html