Yeah, so what would be the easiest way to have a couple of rbd objects follow particle positions? I separated particles using group and then adding a Point, but how could I reference the Point sop's position info at an RBD's object level (it has to use object transform, right)? I just don't know how to reference it properly or which expression to use.. I ended up trying some ridiculous setup with CHOPs exporting, but that only worked with a single object .