From:  Michael Gibson
2309.4 In reply to 2309.3 
Hi Pilou,

> Ok I had expected that exist a special Tangent (G1, G2,....) or Curvature :)

Those options for Blend are for how the Blend surface behaves where it touches the other edges, I mean at these areas here:

If I understand you correctly, you're asking for an option to have the "Blend" surface be G1 at those edges, but have a sharp crease in the middle of the surface instead?

Basically Blend will not do that job - Blend basically assumes that the blended surface itself is a smooth surface object, to make a creased object you will need to use other commands for that.

- Michael