Yes. If they acquire non- directional prefix, both uni- and multi- directional verbs of motion become perfective -----ходить - сходить/ походить; идти - пойти/ ( prefix depends on the function of the perfective) if they acquire directional prefix , they loose their directional idea, and the prefix now shows direction( = направление )They become a normal aspectual pair. Unidirectional verbs of motion become perfective. Multidirectional verbs of motion become imperfective. ----- ходить +вы = выходить / идти + вы= выйти =====>> we have a new aspectual pair выходить - выйти ////// ездить+ при= приезжать / ехать+ при = приехать=====>> приезжать- приехать. Not so simple, but quite manageable once you keep this logic, and take time to practice. Have fun!

направление = direction