dave2dave::::
What type of scenery are you shaping the edge for?
BUild up layers adjacent to the lift area with layers or shaped (vertical) corrugated cardboard box
- vertically it is strong and can be cut to the contour you want to form
- attach with hot glue, cover with egg=carton/ apple tray pulp for rocky contours;
-horizontally you can glue layers of corrugated box, polystyrene or pink sheet to create the side contours of valleys/ streams/ and land folds as required;
- and cover with a light plaster/ house filla layer, use a tooth brush gently stroking to add 'strata' layers and depth/ interest to remove unnatural roundness (which doesnt commonly occur in nature as we model it);
-finally paint dark (black, then brown or umber wash) when dry and highlight with lighter colours for your region before adding a light layer of scenic flock. *Too much flock is a common mistake)...
regds,
dave