The sketch should be reminiscent of Mackenzie's work. I've been developing a theory on how he arrived at some of the shapes for his bunkers. I'm convinced he derived them directly from his surroundings.
There was a flaw in my theory until I recognized something on my Pasatiempo trip. Until then, I hadn't recognized the role that green complexes play in the bunker shape. Now I'm getting more comfortable with my ideas; but, they're still evolving.
The sketch is how I would imagine Mackenzie bunkering the hole if there weren't any trees or significant topography around the hole.
It's difficult finding legitimate Mackenzie bunkering. So much has been lost over years of maintenance and overgrowth. Even Pasatiempo has changed substantially.
The sketch omits one important piece of information, though: From which direction are you hitting your approach shot?