Hey, sry my description was not on the point.
Goal:
Blue - there are Bushes and Palms all over the Island, but not on the Beach
Red - There are Jungle Trees that start at a height level.
Beach - No Foliage 0 - 3m
Palm Area - starting 3m to all over the Island
Jungle Area - starting 10m to all over the Island
So in the Picture I set the Red one in the center to show that it affects all heights in calulation. compared to the first picture, you can see how dense blue is and how punched out it is, although red should only affect in the center.