Cliffs.

[Carnerox]

Is their a way to bypass the raise of cliffs cap, because in my editor I can only raise a cliff twice.

+rep

 

[Dave312]

I do not believe it is possible. Starcraft 2 was designed to only allow 3 levels of cliffs (2 that are pathable by ground units and the third one isn't). I did take a brief look through the data editor and couldn't find a way to change this.

 

[Cheekything]

You can give the illusion of 4 levels, however the most bottom layer cannot be used for anything more than putting doodads in it.

 

[Frozenwind]

It is possible to change the heights in the data editor, however it'll simply bug.
When changing the heights to for example 4 6 8 10 instead of -8 0 2 4 the graphics will start bugging. At some spots you'll see a black hole, rendering your terrain ugly.
I've tried 3 things to find a way to bypass this, including duplicating cliffs etc., but no matter what I did, I always ended up with these black graphic holes.
Maybe overwriting terrain all the time will slowly remove these black holes, but I haven't tried this yet.

Reference:
http://www.thehelper.net/forums/showthread.php?t=154244