I made this for myself to test all the groundcover and trees of a replacer.

This esp contains 30 world spaces with nothing in it, only flat ground.
To access the worlds in game, open cheat console and type  "coc at1" "coc at2" etc. up to "coc at30"
To instantly move to the 30 worlds. ("at" is short for "a test" to easily remember)

I suggest to make your Character invincible first. Console code "tgm"
You will fall from quite a height.
I don't care much for this fall, since it is not made for playing but only testing.