Spring RTS Engine

Hi I'm working on a new map-
Its called Limbo - and it's basically a map with six fortresses - and a terrain which is constantly slowly randomly altered.

The Changes to the terrain come in two Types:
-Additive Shapes
-Substractive Shapes
-The two combined while one is bigger then the other

All Changes are applied symmetrically.

is it randomly generated when the game starts, or does it change throughout each game?

This might be interesting, but depends on the map. Do you have any sketch of how it might be like?

Basically take Zero-Cannines (No-Dog-Discriminating Facists) Terraforming and apply it to the map symettrically, with a angle that allows axes for all units..

Dont know if that is fun- but i think applying it slowly would make it easier to plan for the unexpected.