Because of airline restrictions, I wasn't able to bring a lot of lighting gear to Japan, and I wasn't sure what would be available to us in terms of lighting at the studio we rented until I got there. So I brought along my Strobist lighting kit consisting of 2 Canon 550ex strobes, a couple of umbrellas, stands, and my RadioPopper triggers (I really love those!)
To emulate a ringflash look, I setup one lightstand with two strobes firing through shoot-thru umbrellas, mounted one above the other in a clamshell style lighting setup. Both strobes were set on manual at about 1/8th power, and I positioned my camera between the two umbrellas. Image shot with a Canon 5D and 85mm 1.8 lens.
This one was done with the two shoot-thru umbrellas again, this time each strobe was mounted on its own stand. The lights were setup on either side of the model, slightly behind her, and aimed directly at each other. This served to both light the background and rim light the model.
Oh, and in case anyone is wondering, the model IS wearing clothes. It's the way she is posed that hides the bikini she is wearing. So it's kind of an implied nude, without being an implied nude.