Mark Mandell - Gone Round In New Jersey
has been around for 50 years. It started with the painters essentially working from photographs. It "progressed" to sculpture using first a series of photos and then to industrial laser tomography and CNC machines for the rough-in of the object in wax or wood or stone which was then given to a sculptor to refine. Wax products could then be cast in bronze. I am sure that the process has improved substantially over the years.
Not saying that such is how this particular gent works, but the technical aspects of the effort have been solved. As always, photographs of a sculpture pale when compared to seeing and walking around the actual object. The camera compresses things when translating into the 2D image we see.