Slitherine

With the new heights I am trying to create sort of cliffs, I have added very small tank traps so that tanks cannot climb steep hills. Is there any other way I can achieve the same for infantry?

There is a Cliff terrain type that is impassable to everything, although none of the Russian tiles or objects apply this terrain type. If you set Advanced Mode to On in the Editor, you will be able to select the cliff tiles from either the Desert or Sicily Overlay tilesets. You could also set up your own tile or object with the Cliff terrain type.