There are functions to compute rmsd (e.g. IMP.atom.get_rmsd()) but nothing currently to use it as a scoring function. I'd recommend writing a little restraint or pair score for that.
is there a way of getting the RMSD between two set of particles (not atoms)?
I'd like to create a score based on the RMSD between two models in order to decide when to stop a Molecular Dynamics (or Brownian Dynamics) simulation.