Tom Doak is also a fan of sand faced bunkers; he learned how to design this kind of feature while studying Alister Mackenzie’s work, in many of his courses is possible to see how the English architect influenced and still influence the placement and the shape of sandy hazards.
This will be easier to understand if we compare some pictures of the two designers: the style of MacKenzie bunkering at the Augusta National and at Cypress Point and Doak’s at Black Forest and at the Atlantic City Country Club; shapes are soft and the sand seems part of the ground itself.