Is there some straightforward procedure or plugin that would smooth sharp (in this case vertical edges) in a landscape surface?
The sharp edges is the result of merging two surfaces made with toposhaper, 1) a larger area and 2) the area of special interest. This procedure allows the modelling of the area of special interest with a sufficient amount of detail. The first one is merely for setting the context. Here, sufficent amount of detail = number of toposhaper triangles reserved for the special interest area.
A slice of the merged terrain can be found in the attached file.
Edge_problem2.skp (926.4 KB)