Using the bases as a template, I drew their shape onto sheets of 2cm styrofoam. I like this height per level for the 90's stylized type of hills. I then dotted an inner line about a centimeter in, to use as a cutting guide, to get me some space between the hill and the edge of he base.
I set my hot wire cutter at a slight angle and cut out the shapes. The 2nd levels I more or less freehanded, but with the same angle.
I have a box of Woodland Scenics' cast cliff faces, from which I picked some to represent unpassable areas.
With construction glue, I put everything together.
For the two table edge hills, I cut a back-wall also from 3mm ePVC and glued it in a 90° angle to the back of the hills after cutting the contour of the hill into it.
