Jeff Moody did a setup at one of JT's early weekend shoots in which he had a sheet stretched across a 6 by 8 foot frame. Probably wasn't just a sheet and the dimensions may be a foot off or so, but you know what I mean. Behind that he placed 3 stands holding flash heads and spaced out may 2 or 3 feet horizontally apart. Sort of converted part of the room into a HUGE softbox.
Anyway, you could stand between the sheet and the model and fire away. There was enough wrap around that your shadow wouldn't show up in the images if you stayed back a bit from the model. It was very even and flattering light. (I think part of that was that the room walls were bright red and added a slight coloration.)
But anyway, I've wanted to try that again, and actually started collecting bits and pieces to build the frame. Using PVC, it'd be a breeze to build. My version will be kludged together from an old aluminum 3-panel hospital screen with the curtain material replaced with stretched ripstop or some such.