A crop of the final image, out in the field Feb 2015.
This is the draft composite from the agency, created using stock photography.
I built a model, using the shape of the stock hourglass as a guide.
I texture, light and render the hourglass.
I photographed the talent in the studio.
I composited talent into the scene and graded.
I composited in some falling sand, and the image is complete.