I know that, but when you resize the copy the features (ups and downs) are resized also. Maybe I'm missing something here. Let's say you have an elephant standing so that it's rear feet rest on a very small bump in the terrain at 1' high, and it's front feet rest on a very small different bump at 2' high. When you copy and resize the bumps change position as well as height, so the second layer of terrain will not conform where it needs to to keep the elephant resting on the ground properly. A cutout and copy will work but I'd have to repeat it over and over to get the exact scenic effect because I'm stupid fussy.