Yes, the taped loose black cloth is a quick and easy fix that works when you don't have a studio ceiling. If one has a pre-light day, an effective method to increase the effectiveness is to wet the cloth, crumple it badly, like keep it crumpled under some weight for a couple of hours, and then letting it dry out without stretching it... That hardens in the crush, and makes it more effective at absorbing the spills and bounce, just like a diffuser or baffles for sound