Yes what you did there looks like what I’m looking for, how are your edges so smooth?
Well, as I´ve shown you, using a Rectangle object, enabling the terraforming on it, giving it only 1 m falloff distance, and editing the heights at different points... it´s a cliff from 250m into the sea in just only 30m witdth, so.... a 90% of slope
Please, don´t forget to tell me the ICAO code of your airport, I would like to look at it carefully.
THANKS
Let´s see if from here you see it clearer... each orange line, matches one profile height in the second picture.
This one makes it crystaline clear
And this last one, gives you the final aspect combining different rectangles... this is so far the best way I´ve found doing cliffs....