is it possible in grasshopper to extrude a none planar closed curve having each side of the closed curve extrude in independent direction .( each side to be extruded on a vector different than the other .
When using the extrude function, you can attach multiple vectors to the same Direction parameter by holding down Shift key when connecting components. To extrude multiple curves at once with the same vectors, right click on "Base" and select Graft. Hope this helps.