Thanks Michael. That is just what I was thinking - two layers of white subject, one over the other. I overexposed in post to bring out the background geometry, otherwise it would have been white on white on black (probably a more striking image, although I do like the depth here)
This is a stunning image Peter. I'm not sure about "white on white" but I suppose you could argue there are two layers of white subject. Great lighting and composition anyway. Regards, Michael