@rv1974 LOL
ok, I remember it being bug splatty, but it was years since last I used it and I simply was not abble to use it this time.
But saying I shouldn´use it is the second part of my question, except I asked suggestions for how to do what I needed, without this plugin.
maybe before draping I could smooth the sidewalks until they are a single selection. Then I drape. Then instead of selecting each plant square and change it's color, I do the opposite. Paint the sidewalks another material. Doing that will alow me to select all entities with still the original sidewalk material to properly deal with them all at the time time (vector push pull)