An attempt to isolate edges and control the material around them.
It is based on randomly added points stored in external file.
I didn't find a way to access the edges directly (H12.5), but if grouped, they can be accessed through the group.
(Tried to use Group SOP to select edges by angle, but had some problems using the grouped geometry
It seems a bit tedious process... I hope, there is an easier way, that I'm not aware of :)