The first few holes at the Renaissance Club are on a flat piece of land...
About the naturalism, minimalism issue: here's my take...
Naturalism is about try to imitate nature on a course and basically dissolve the line between the landscape and the golf course. It's more about a look. To dissolve the line between landscape and the golf course can take a lot of effort and shaping if you want to or need to. It also involves letting more nature on the course, having the 3 layers of vegetation with local plants (trees, bushes and grasses).
Minimalism is about trying to do the best course possible with the least amount of work... That means, if you need to move 15 000 cubic yard of dirt to manufacture one hole that allows the existance of 6 others... it could be called minimalism of maybe common sense.
In the detail, it is about building a hole only with stuff that are essential to the strategy of the hole. Garden City greens are a good example of that, just a tilt. It would hae been easy to put a little bump on a green here and there on some of those greens, but they didn't... Sometimes one small bunker is enough for a 400 yard hole.
Most of the minimalist courses are naturalist.. but it's not mandatory