hi Maxime, thank you for your availability. Bacca's answer immediately cleared my mind on the subject, just as I was reading the other thread. I usually use the traditional method of calculating vertexmaps in the presence of obstacles. I thought CalcVertexMap did just that (the restriction tag is not mentioned in the SDK, so I couldn't figure out how to use it) but my curiosity is just didactic.
Ciao
Gianluca