Hi I'm just studying about RBD solver and its fracturing with first picture's object. and When I setup those with solvers (rigidbody solver and sop solver will be added), I could find some interpenetration in it.     Those boxes were having interpenetration, so I've looking for some tutorials about it. and I found 'Glue constrain' but that tutorial used it for fractured(and packed) object. Does 'Glue constrain' be able to used in my situation ?? Than