This is probably very basic but I fail to find a way to cut surfaces with an open polyline and pull a point of that polyline [and the surface the polyline encloses]
Example: a V shaped cut on a surface. How to achieve that? Further I want to ‘peel’ the V surface by pulling out the point at the base.
Like drawing fish scales on a surface and then pulling the tip outwards but still having a smooth transition at the base [see attachment - this was done by having a separate surface which is what I want to avoid]
I would really appreciate any hints, I find myself wanting to design this kind of surfaces rather often