“Calling my artwork bas-relief,” Mack says, “is incorrect since bas-relief technically refers to low relief sculpture. My art, in fact,has more physical depth than high relief; it incorporates various elements in full-round rising toward the viewer as in my “Illusion” image where her leg leaves the background extending into space. Technically, sculptures combining various levels of relief and full-round parts are called ‘Alto Relief’ sculptures. A similar technique has been used on classic Roman and Greek buildings. However, until I offered my current collection of sculptures, this art form had not appeared to any extent in galleries.” Combining low and high relief, incised lines, and elements in the full-round in sculpture works that are light enough to be hung on a wall, Mack directly involves the viewer in a 3-dimensional experience, both textural and tactile, that is often startling real. Mack has achieved worldwide acceptance. He has had exhibitions in galleries from New York City to Beverly Hills, and from Tokyo to Frankfurt. His work is in the collections of President Clinton and former Presidents Ford and Reagan – Actors and renowned art aficionados, Sylvester Stallone, Elizabeth Taylor, and Tony Curtis – International business leaders Mrs. Yaeko Shiotsuki, Hermann Schnabel, and Irwin Jacobs – and celebrities as diverse as Kenny Rogers, comic Howie Mandel, and record producer Jimmy “Jam” Harris. His piece entitled “Lady” is part of the permanent collection of the Statue of Liberty National Monument on Liberty Island. His sculpture of basketball great Kareem Abdul-Jabbar hangs in the entry of the NBA Hall of Fame, and he has also created sculptures that are under consideration for installation in the International Tennis Hall of Fame (Arthur Ashe), the American and Canadian Hockey Hall of Fame (Hobey Baker). His sculpture of Lyle Alzado is in the collection of the NFL Hall of Fame and a sculpture of Peggy Fleming is on permanent display at the United States Figure Skating Hall of Fame.