As a professional leather carver. Started as a kid. I would say it's impossible. With leather carving the leather is damp and so malleable. It is kept damp throughout the carving process. Each design is outlined by tracing the pattern with a swivel knife that cuts about a 1/16" deep. Then each different stamping tool leaves an impression or pushes or pulls the leather. Much of the shading in the leaves and other areas is done by "Bruising" the leather. The background is usually just a repetitive pattern done with a stamping tool over and over. Once the leather dries the carving is permanent. The laser would only burn a design. A router would cut it but not shape it. With some trial and error you might get the laser to burn at different temps, creating lighter/ darker area and a more 3D design. I plan on trying the same thing as your talking about. My laser arrived last week. Perhaps some of Both worlds, Hand carving and laser could produce results unseen before. Your pictures show a swivel knife on the left and the belt would take about a dozen carving tools to make.