I have some more time. Luckily, as I'm not satisfied. This is more what it should look like, but I want the ditches and embankments more pronounced (I already lowered the sun). They are 1.5 meters high/low, and about 6-10 meters wide (from left to right: ditch, embankment, zero area, embankment+poles), with poles spaced at 1.5 meters apart. It doesn't look right somehow, perhaps because of the rough grass. A few hours left to play with this....