Optical flow suggestion

Optical flow is great! But the computation time is too long.

I think just need to calculate low mesh vertex nearby pixel matching, and moving low mesh vertex.
Don’t need so many vertex arrays,This is pointless.

I don’t know whether this is feasible, but can have a try. Thanks!

You can reduce computation time by reducing Resolution initial and Resolution final parameters. And yes, you can wrap some lowpoly proxy geometry and then deform the original basemesh the same way using Lattice node.