a second question along modification lines: and, predicate to my second question along modifying lines, does ss (or any mod you are aware of, including vanilla) in terms of its overall combat system relative to terrain, provide for a rough terrain combat modifier relative to mountainous and/or predominately hill-comprised terrain?

my question, other than the previous noted possibility, is what combat system modifier(s) are presently associated with said hill and/or mountain map-related terrain? e.g. are the 4 listed effects somehow substituted or otherwise combined to produce a combat modifier comparable to said terrain variation and its effect upon combat?