TO achieve this look, we used one large Paul Buff parabolic umbrella just off to the right as our main light and then we used two smaller umbrellas on the background, one on each side, pointed at the wall. We also had multiple V-flats to help reflect and block some of the light. We wanted to keep a very soft shadow on the floor and give a little depth and contour to the model and shoes. I think we achieved all of our goals.
Here is one of the images from that shoot: