Making of The Hole

4. Apply the greeble modifier with these parameters:

5. Apply again the greeble modifier with these parameters => It s Magic ;-) :

6. You obtain this, it is a little bit confusing like this:

7. With some ligthing with shadows you have this:

8. To break the monotony of greeble you can add some tubular. You go back on the editPoly level and select these edges. Than convert it to spline.