When you build a golf course feature, the idea is to make it appear as if it was never built at all. A lifelong interest in geology and soil is a helpful first step in understanding natural looking landforms and then being able to implement them through tools big and small. Get the forms close with the machine, but get the final look and texture right with the sand pro and hand tools.
Santa Ana Country Club, Santa Ana, CA - 2016 Jay Blasi redesign of Ted Robinson redesign of John Duncan Dunn Original
The above two photos are of the drivable 6th hole (left) and the pair of bunkers on the right side of 10 fairway (right)