i would second that suggestion...if you look at it, you can see that the "grids" are not consistently even, so i imagine that they've been piped. that is a gorgeous cake!!!!!!!!
I seem to recall reading somewhere long ago that he did it with Sugarveil, then added the lace medallions.
OMG Lesia, I think you're right. I just looked up sugarveil on the net and I think he may have even done the bows with it. They look like real fabric! Amazing!