Thats a great statement to use when dealing with courses built on great sites, sandy sites. However, once you move inland, or in the case of places like Sand Hills or Ballyneal, away from the dunes, you lose some of the ability to stay with this. When given a site that is mostly loam or clay based soil, you can't have a 'natural' looking bunker, unless you are willing to have it be some color other than white. I think so much of the proliferation of manufactured courses here in the US in recent years has happened because so often courses were forced into locations that were not the most ideal but somehow expected to be world class. Tom Doak, et al, have been exceptionally blessed with great sites to work with, for the most part, and therefore, their work looks less manufactured than does the work of some others.