Bill Mack stands as the foremost practitioner of relief sculpture on the global stage. Specializing in "alto relief," a form rooted in ancient temple friezes and marble sepulchers, Mack's mastery is unparalleled, making this particular style a rarity within contemporary galleries. Navigating the demanding intricacies of alto relief, where foreshortening presents formidable technical hurdles, Mack proves himself not just a sculptor but a virtuoso draftsman. Every relief he crafts is a product of meticulous studies, particularly of the foreshortened figure—a classic skill that profoundly influences the quality and depth of his sculptural masterpieces.